| RAM | 256 GB |
|---|
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From the manufacturer
Samsung 256GB MicroSDXC EVO Select Memory Card with Adapter
With stunning speed and reliability, the Samsung 256GB microSDXC EVO Select memory card lets you get the most out of your devices. Ultra-fast read & write speeds of up to 100MB/s & 90MB/s and backed by 4-proof protection, keep your data safe against water, extreme temperatures, and other harsh conditions. Feel confident to capture, store and transfer 4K UHD videos, photos, music and other large files effortlessly. Your memories and adventures are irreplaceable, and now unforgettable.
Simply The Right Card
More space and higher speed. Free up your devices with the largest capacity and highest read/write speeds in its class, perfect for 4K UHD video.¹ With astonishing performance and reliability, EVO Select lets you capture and save all of your treasured memories.
¹4K UHD video support for 51GB, 256GB and 128GB cards. Host device compatibility my vary.
Fulfill Your Need For Speed
Record and play 4K UHD video without glitches. With superfast read & write speeds up to 100MB/s & 90MB/s respectively, the 256GB EVO Select lets you transfer a 3GB video to your notebook in just 38 seconds.¹ Shoot flawless high quality photos and videos, and share them all in an instant.
¹The foregoing read & write speeds are based on internal tests conducted under controlled conditions. Actual speeds may vary depending upon card capacity.
Capacity to Live Large
Never worry about space again. With massive amounts of storage the Samsung 256GB EVO Select is enough memory for up to 12 hours of 4K UHD video, 39 hours of Full HD video, 75,200 photos, or 39,400 songs.† So go ahead and savor all of what life has to offer, and keep it all too.
Extended Compatibility
Compatible with a wide range of devices for both SD and micro SD. You can even capture detailed 4K UHD video. The included SD adapter fits most devices under almost every brand name, while preserving all of EVO Select’s outstanding speed and performance.
4-Proof Protection
Your experiences are irreplaceable, and now unforgettable. Backed by 4-proof protection, the EVO Select can withstand up to 72 hours in seawater¹, extreme temperatures², airport X-ray machines³ and magnetic fields⁴ equivalent to an MRI scanner.
¹Certified waterproof with IEC 60529 and IPX7 rating. ²Operating temperatures of -25° to 85°C, non-operating temperatures of -40°C to 85°C. ³X-Ray Proof: up to 100mGy. ⁴Magnetic-Proof up to 15,000 gauss.
Disclaimers
†Test Device : Samsung Galaxy S9+ For 32GB, FAT32 file system is used and for 128GB / 512GB, exFAT file system is used. ¹ 3840x2160 4K UHD(30 fps), Average file size recording for 30 mins : 10.1GB ² 1920x1080 Full HD(30 fps), Average file size recording for 30 mins : 3.09GB ³ 4032x3024 12MP, Average file size : 3.25MB ⁴ Average MP3 file size : 6.2MB
Samsung is not liable for i) damages and/or loss of data or ii) expenses incurred from memory card date recovery.
Compare with similar items
 | SAMSUNG 256GB EVO Plus MicroSDXC w/Ad | Amazon Basics microSDXC Memory Card with Full Size Adapter, A2, U3, Read Speed up to 100 MB/s, 256 GB, Black/Customized | Amazon Basics microSDXC Memory Card with Full Size Adapter, A2, U3, Read Speed up to 100 MB/s, 512 GB, Black/Customized | Amazon Basics microSDXC Memory Card with Full Size Adapter, A2, U3, Read Speed up to 100 MB/s, 128 GB, Black/Customized | Amazon Basics microSDXC Memory Card with Full Size Adapter, A2, U3, Read Speed up to 100 MB/s, 64 GB, Pack of 2, Black/Customized | |
|---|---|---|---|---|---|---|
| Customer Rating | (48661) | (2248) | (38154) | (38154) | (38154) | (38154) |
| Price | From $104.97 | $27.50 | $29.44 | $66.49 | $17.09 | $17.91 |
| Shipping | — | FREE Shipping. Details | FREE Shipping. Details | FREE Shipping. Details | FREE Shipping on orders over $25.00 shipped by Amazon or get Fast, Free Shipping with Amazon Prime | FREE Shipping on orders over $25.00 shipped by Amazon or get Fast, Free Shipping with Amazon Prime |
| Sold By | Available from these sellers | SNC Sales | Amazon.com | Amazon.com | Amazon.com | Amazon.com |
| Computer Memory Size | 256 GB | — | — | — | 128 GB | 64 GB |
| Digital Storage Capacity | 256 GB | 256 GB | 256.0 GB | 512.0 GB | 128.0 GB | 64.0 GB |
| Flash Memory Type | SDXC | Micro SDXC | Micro SDXC | Micro SDXC | Micro SDXC | Micro SDXC |
| Item Dimensions | 0.59 x 0.04 x 0.43 inches | 0.59 x 0.04 x 0.43 inches | 0.59 x 0.43 x 0.04 inches | 0.59 x 0.43 x 0.04 inches | 0.59 x 0.43 x 0.04 inches | 0.59 x 0.43 x 0.04 inches |
| Memory Storage Capacity | 256 GB | 256 GB | 256 GB | 512.0 GB | 128 GB | 64 GB |
| Secure Digital Association Speed Class | Class 10 | Class 10 | Class 10 | Class 10 | Class 10 | Class 10 |
| Size | 1 Count (Pack of 1) | — | 256GB | 512GB | 128GB | 64GB (2pack) |
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For funsies, I bought a couple of microSD cards that were obviously "fake flash" (where the card misrepresents itself as a higher capacity than it actually is) and ran them through some tests to see what capacity they really were and how reliable they were. I bought this card as my control.My rig for doing these tests was an Orange Pi 4 running Armbian (a Ubuntu-based distro tuned towards single board computers). I used AltraMayor's f3 suite of tools, along with ncw's stressdisk tool (both of which you can find on Github).Step 1 was to see how the card represented itself to the operating system. You can see from the dmesg logs that it presented itself as a 256 GB card to the OS. (It technically presented itself as having 500,695,040 512-byte blocks -- which would come out to 256,355,860,480 bytes. Most computer programs measure a gigabyte as 1024^3, whereas most products are advertised using 1000^3. So by the latter definition, this card is 256 GB; but by the former definition, it's only 239 GB. It's annoying, but not unexpected.)Step 2 was use to use f3probe to see what the card's actual capacity is. (This program works by writing pseudorandom data to different places on the card, then reading it back to see if it matches what's expected. Genuine flash will always return the data that's expected, whereas fake flash will return the expected data up to a point -- after which it'll start returning bad data.) The good news here is that it only took f3probe 29 seconds to tell me that yes, this card is actually 256 GB. (For comparison, it took it over three hours to tell me that my two "fake flash" cards -- which were advertised as 1024 GB -- were actually only about 8 GB in size.)Step 3 was to use f3write and f3read. (These programs fill up all of the available space on the card with pseudorandom data -- as opposed to f3probe, which just writes data to strategic points on the card -- and the read it back to see if it matches what's expected, to check that the flash cells are working properly.) Again, nothing but good news here -- this card passed with flying colors.Step 4 was to run a stress test on the card using stressdisk. (This program fills up the card with pseudorandom data, then reads it back a couple of times to check to see if it matches what's expected. It then writes new data to the card, reads it back a couple of times, and repeats this process over and over again for 24 hours -- watching to see if any errors crop up.) Once again, this card passed with flying colors -- not a single error during the entire 24 hours. (One of my "fake flash" cards started showing errors about halfway through the test; the other one started showing errors before the 2-hour mark.)The last thing to look at is read/write speeds. Both f3read/f3write and stressdisk will tell us what read/write speeds it was able to attain -- so all we have to do is look at the output from those programs. This card carries the UHS-3 mark -- which means that it must be able to sustain read/write speeds of at least 30 MB/sec -- and this card blew that out of the water. Both tools said that it was able to attain over 67 MB/sec write speed and over 87 MB/sec read speed. Heck, that's enough to qualify for the next highest speed rating, V60 -- which requires read/write speeds of at least 60 MB/sec. (Samsung advertises that this card can get over 90 MB/sec write speed and 100 MB/sec read speed -- I'm going to chalk up the difference to limitations in my rig.)So if you're looking for a good quality SD card...in my opinion, this is it!
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Reviewed in the United States 🇺🇸 on January 24, 2021
For funsies, I bought a couple of microSD cards that were obviously "fake flash" (where the card misrepresents itself as a higher capacity than it actually is) and ran them through some tests to see what capacity they really were and how reliable they were. I bought this card as my control.
My rig for doing these tests was an Orange Pi 4 running Armbian (a Ubuntu-based distro tuned towards single board computers). I used AltraMayor's f3 suite of tools, along with ncw's stressdisk tool (both of which you can find on Github).
Step 1 was to see how the card represented itself to the operating system. You can see from the dmesg logs that it presented itself as a 256 GB card to the OS. (It technically presented itself as having 500,695,040 512-byte blocks -- which would come out to 256,355,860,480 bytes. Most computer programs measure a gigabyte as 1024^3, whereas most products are advertised using 1000^3. So by the latter definition, this card is 256 GB; but by the former definition, it's only 239 GB. It's annoying, but not unexpected.)
Step 2 was use to use f3probe to see what the card's actual capacity is. (This program works by writing pseudorandom data to different places on the card, then reading it back to see if it matches what's expected. Genuine flash will always return the data that's expected, whereas fake flash will return the expected data up to a point -- after which it'll start returning bad data.) The good news here is that it only took f3probe 29 seconds to tell me that yes, this card is actually 256 GB. (For comparison, it took it over three hours to tell me that my two "fake flash" cards -- which were advertised as 1024 GB -- were actually only about 8 GB in size.)
Step 3 was to use f3write and f3read. (These programs fill up all of the available space on the card with pseudorandom data -- as opposed to f3probe, which just writes data to strategic points on the card -- and the read it back to see if it matches what's expected, to check that the flash cells are working properly.) Again, nothing but good news here -- this card passed with flying colors.
Step 4 was to run a stress test on the card using stressdisk. (This program fills up the card with pseudorandom data, then reads it back a couple of times to check to see if it matches what's expected. It then writes new data to the card, reads it back a couple of times, and repeats this process over and over again for 24 hours -- watching to see if any errors crop up.) Once again, this card passed with flying colors -- not a single error during the entire 24 hours. (One of my "fake flash" cards started showing errors about halfway through the test; the other one started showing errors before the 2-hour mark.)
The last thing to look at is read/write speeds. Both f3read/f3write and stressdisk will tell us what read/write speeds it was able to attain -- so all we have to do is look at the output from those programs. This card carries the UHS-3 mark -- which means that it must be able to sustain read/write speeds of at least 30 MB/sec -- and this card blew that out of the water. Both tools said that it was able to attain over 67 MB/sec write speed and over 87 MB/sec read speed. Heck, that's enough to qualify for the next highest speed rating, V60 -- which requires read/write speeds of at least 60 MB/sec. (Samsung advertises that this card can get over 90 MB/sec write speed and 100 MB/sec read speed -- I'm going to chalk up the difference to limitations in my rig.)
So if you're looking for a good quality SD card...in my opinion, this is it!
My rig for doing these tests was an Orange Pi 4 running Armbian (a Ubuntu-based distro tuned towards single board computers). I used AltraMayor's f3 suite of tools, along with ncw's stressdisk tool (both of which you can find on Github).
Step 1 was to see how the card represented itself to the operating system. You can see from the dmesg logs that it presented itself as a 256 GB card to the OS. (It technically presented itself as having 500,695,040 512-byte blocks -- which would come out to 256,355,860,480 bytes. Most computer programs measure a gigabyte as 1024^3, whereas most products are advertised using 1000^3. So by the latter definition, this card is 256 GB; but by the former definition, it's only 239 GB. It's annoying, but not unexpected.)
Step 2 was use to use f3probe to see what the card's actual capacity is. (This program works by writing pseudorandom data to different places on the card, then reading it back to see if it matches what's expected. Genuine flash will always return the data that's expected, whereas fake flash will return the expected data up to a point -- after which it'll start returning bad data.) The good news here is that it only took f3probe 29 seconds to tell me that yes, this card is actually 256 GB. (For comparison, it took it over three hours to tell me that my two "fake flash" cards -- which were advertised as 1024 GB -- were actually only about 8 GB in size.)
Step 3 was to use f3write and f3read. (These programs fill up all of the available space on the card with pseudorandom data -- as opposed to f3probe, which just writes data to strategic points on the card -- and the read it back to see if it matches what's expected, to check that the flash cells are working properly.) Again, nothing but good news here -- this card passed with flying colors.
Step 4 was to run a stress test on the card using stressdisk. (This program fills up the card with pseudorandom data, then reads it back a couple of times to check to see if it matches what's expected. It then writes new data to the card, reads it back a couple of times, and repeats this process over and over again for 24 hours -- watching to see if any errors crop up.) Once again, this card passed with flying colors -- not a single error during the entire 24 hours. (One of my "fake flash" cards started showing errors about halfway through the test; the other one started showing errors before the 2-hour mark.)
The last thing to look at is read/write speeds. Both f3read/f3write and stressdisk will tell us what read/write speeds it was able to attain -- so all we have to do is look at the output from those programs. This card carries the UHS-3 mark -- which means that it must be able to sustain read/write speeds of at least 30 MB/sec -- and this card blew that out of the water. Both tools said that it was able to attain over 67 MB/sec write speed and over 87 MB/sec read speed. Heck, that's enough to qualify for the next highest speed rating, V60 -- which requires read/write speeds of at least 60 MB/sec. (Samsung advertises that this card can get over 90 MB/sec write speed and 100 MB/sec read speed -- I'm going to chalk up the difference to limitations in my rig.)
So if you're looking for a good quality SD card...in my opinion, this is it!
Images in this review
Reviewed in the United States 🇺🇸 on March 8, 2023
Reviewed in the United States 🇺🇸 on April 27, 2023
Reviewed in the United States 🇺🇸 on November 3, 2020
s/n xxHM037 and Kingston MLPM reader:
$ f3write Average writing speed: 77.48 MB/s.
$ f3read Data OK: 238.69 GB (500562432 sectors), Data LOST: 0.00 Byte (0 sectors), Corrupted: 0.00 Byte (0 sectors), Slightly changed: 0.00 Byte (0 sectors), Overwritten: 0.00 Byte (0 sectors), Average reading speed: 94.55 MB/s.
s/n xxCM037 and Kingston MLP reader:
$ f3write Average writing speed: 77.62 MB/s.
$ f3read Data OK: 238.69 GB (500562432 sectors), Data LOST: 0.00 Byte (0 sectors), Corrupted: 0.00 Byte (0 sectors), Slightly changed: 0.00 Byte (0 sectors), Overwritten: 0.00 Byte (0 sectors), Average reading speed: 94.55 MB/s.
s/n xxUB037 and Kingston MLPM reader:
$ f3write Average writing speed: 77.52 MB/s.
$ f3read Data OK: 238.69 GB (500562432 sectors), Data LOST: 0.00 Byte (0 sectors), Corrupted: 0.00 Byte (0 sectors), Slightly changed: 0.00 Byte (0 sectors), Overwritten: 0.00 Byte (0 sectors), Average reading speed: 94.55 MB/s.
s/n xxBL039 and Kingston MLP reader:
$ f3write Average writing speed: 77.56 MB/s.
$ f3read Data OK: 238.69 GB (500562432 sectors), Data LOST: 0.00 Byte (0 sectors), Corrupted: 0.00 Byte (0 sectors), Slightly changed: 0.00 Byte (0 sectors), Overwritten: 0.00 Byte (0 sectors), Average reading speed: 94.55 MB/s.
'sfdisk -J /dev/sdb1' {"partitiontable": {"label":"dos","id":"0x00000000","device":"/dev/sdb","unit":"sectors","sectorsize":512,"partitions": [{"node":"/dev/sdb1", "start":65536, "size":500629504, "type":"7"}]}}.
'udisksctl info -b /dev/sdb1 | grep IdUUID' IdUUID: 9C33-6BBD.
Be sure to reformat these Samsung EVO Select cards before putting the card into use. The factory default MBR is zero-ID, and exFAT filesystem on partition one on all cards have the same Volume Serial Number; this is lazy manufacturing process and is problematic if using multiple cards in the same system. A zero-ID MBR is not likely to cause problems however the exFAT VSN should be unique. The factory exFAT filesystem copied onto these cards isn't even cleanly-unmounted; I wouldn't trust this card with anything important until you secure erase followed by partition and format. As noted above in the sfdisk JSON output the first partition is aligned to 512-byte sized sector number 65536 (32MiB), additionally the first 446 bytes of MBR are zero-value so there's nothing extra or nefarious hidden in there.
Summary: Good card, get the 256GB or larger size for best performance, and don't forget to re-partition and format before use.
Verification with Fight Flash Fraud f3write / f3read
Reviewed in the United States 🇺🇸 on November 3, 2020
Bought four EVO Select 256GB microSDXC cards and tested directly out of factory packaging using Fight Flash Fraud.Reviewed in the United States 🇺🇸 on November 3, 2020
s/n xxHM037 and Kingston MLPM reader:
$ f3write Average writing speed: 77.48 MB/s.
$ f3read Data OK: 238.69 GB (500562432 sectors), Data LOST: 0.00 Byte (0 sectors), Corrupted: 0.00 Byte (0 sectors), Slightly changed: 0.00 Byte (0 sectors), Overwritten: 0.00 Byte (0 sectors), Average reading speed: 94.55 MB/s.
s/n xxCM037 and Kingston MLP reader:
$ f3write Average writing speed: 77.62 MB/s.
$ f3read Data OK: 238.69 GB (500562432 sectors), Data LOST: 0.00 Byte (0 sectors), Corrupted: 0.00 Byte (0 sectors), Slightly changed: 0.00 Byte (0 sectors), Overwritten: 0.00 Byte (0 sectors), Average reading speed: 94.55 MB/s.
s/n xxUB037 and Kingston MLPM reader:
$ f3write Average writing speed: 77.52 MB/s.
$ f3read Data OK: 238.69 GB (500562432 sectors), Data LOST: 0.00 Byte (0 sectors), Corrupted: 0.00 Byte (0 sectors), Slightly changed: 0.00 Byte (0 sectors), Overwritten: 0.00 Byte (0 sectors), Average reading speed: 94.55 MB/s.
s/n xxBL039 and Kingston MLP reader:
$ f3write Average writing speed: 77.56 MB/s.
$ f3read Data OK: 238.69 GB (500562432 sectors), Data LOST: 0.00 Byte (0 sectors), Corrupted: 0.00 Byte (0 sectors), Slightly changed: 0.00 Byte (0 sectors), Overwritten: 0.00 Byte (0 sectors), Average reading speed: 94.55 MB/s.
'sfdisk -J /dev/sdb1' {"partitiontable": {"label":"dos","id":"0x00000000","device":"/dev/sdb","unit":"sectors","sectorsize":512,"partitions": [{"node":"/dev/sdb1", "start":65536, "size":500629504, "type":"7"}]}}.
'udisksctl info -b /dev/sdb1 | grep IdUUID' IdUUID: 9C33-6BBD.
Be sure to reformat these Samsung EVO Select cards before putting the card into use. The factory default MBR is zero-ID, and exFAT filesystem on partition one on all cards have the same Volume Serial Number; this is lazy manufacturing process and is problematic if using multiple cards in the same system. A zero-ID MBR is not likely to cause problems however the exFAT VSN should be unique. The factory exFAT filesystem copied onto these cards isn't even cleanly-unmounted; I wouldn't trust this card with anything important until you secure erase followed by partition and format. As noted above in the sfdisk JSON output the first partition is aligned to 512-byte sized sector number 65536 (32MiB), additionally the first 446 bytes of MBR are zero-value so there's nothing extra or nefarious hidden in there.
Summary: Good card, get the 256GB or larger size for best performance, and don't forget to re-partition and format before use.
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Reviewed in the United States 🇺🇸 on February 14, 2023
Reviewed in the United States 🇺🇸 on February 26, 2023
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