Sandisk 32GB MicroSDHC Class 4 Memory Card & MicroSDHC Card Reader (Bulk)

by SanDisk

Product Details

• Shipping Weight: 4 ounces (View shipping rates and policies)
• ASIN: B004JISIE4
• Item model number: 32G_TF_C4_R7BK
• Average Customer Review: 4.3 out of 5 stars  See all reviews (111 customer reviews)
• Amazon Best Sellers Rank:
  • #2 in Electronics > Computers & Add-Ons > Computer Accessories > Memory Card Readers
• Date first available at Amazon.com: January 17, 2011

Product Description

Sandisk 32GB Class 4 MicroSDHC Card with SD Adapter and Micro USB Flash Card Reader / Writer #R13. Brand New in BULK Packaging.32GB MicroSDHC Memory Card.Class 4 - 4mb/s Read/Write Speed.Transflash Memory and USB memory card reader.

Customer Reviews

Most Helpful Customer Reviews

71 of 72 people found the following review helpful:

5.0 out of 5 stars Passed my test, June 24, 2011

By 

James T Laubenthal - See all my reviews

Amazon Verified Purchase

This review is from: Sandisk 32GB MicroSDHC Class 4 Memory Card & MicroSDHC Card Reader (Bulk) (Personal Computers)

I can't prove this is actually a Sandisk card as another reviewer had concerns about, it does have the Sandisk logo printed on it and is marked class 4.

What I can attest to is the actual performance.

When I recieved the card I immediately ran a benchmark test.

Results are:

Write speed: 5.28 MB/s

Read speed: 16.2 MB/s

useable memory space 29.7 GB (average for this size card from what I have read.)

This memory card so far has exceeded my expectations.

The USB adapter is just an added bonus and since my computer has a card reader I probably will never use it.

32 of 32 people found the following review helpful:

4.0 out of 5 stars This Sandisk 'class-4' micro-SDHC card is faster than a PNY 'class-10', November 21, 2011

By 

NLee the Engineer (Nashua, NH) - See all my reviews
(HALL OF FAME REVIEWER)    (TOP 10 REVIEWER)   

This review is from: Sandisk 32GB MicroSDHC Class 4 Memory Card & MicroSDHC Card Reader (Bulk) (Personal Computers)

I purchased this Sandisk 32GB MicroSDHC Class 4 Memory Card over one month ago, for use in my VIZIO 8-Inch Tablet VTAB1008. At the same time, I also purchased a higher-priced PNY 32 GB microSDHC Card (P-SDU32G10-EFS2) which is supposed to be a 'class-10'. My benchmark results, however, show that the Sandisk class-4 card is actually faster - most of the time.

I used two sets of benchmark programs. One is called 'Flash Memory Toolkit v2.0', which measures the random read/write speed of files between 1MB and 15MB. The other one is called 'H2testw v1.4', which measures the sequential read/write speed using 1GB files. Here are my results: (see my uploaded charts in 'Customer Images' section for details)

- For smaller files (1-5MB), the Sandisk class-4 card gives an amazing write speed of 15-17MB/s, while the PNY 'class-10' card can only get 1-6MB/s

- For larger files (10-15MB), the Sandisk and PNY cards are about equal at around 8MB/s for write

- For huge files (1GB), the PNY did better at 9.5MB/S, while the Sandisk dropped to 5.5MB/s

- The read speeds of both cards are equally high at around 18MB/S (this number may be limited by the maximum speed of my card reader used)

What the above shows is that: When used in a typical digital camera (with file size 3-5MB), this Sandisk 'class-4' card is at least twice as fast as the PNY so-called 'class-10' card. But when used in a HD video camera (sequential writing of huge file), then the PNY card should perform better.

For a card to be marketed as a 'class-10', it must maintain a MINIMUM write speed of 10MB/s. So by this definition, the PNY card does not qualify since it cannot even achieve a MAXIMUM write speed of 10MB/s. This Sandisk card, on the other hand, exceeds the requirement of 'class-4' by a huge margin.

Sandisk seems to be the only flash memeory manufacturer that still gives honest, conservative speed class ratings. Any other manufacturers would have labeled this card a 'class-6' or even higher. As a matter of principle, I rather give my money to a company that promises less but delivers more, instead of to others that do the opposite.

The only problem with this package is that: the included Sandisk MicroMate USB Card Reader (SDDR-121-GREY) does not work at all. I tested it with differet micro-SD/SDHC cards on three different computers. They all can recognize the drive, but not the memory card inside. Minus one star for that.

26 of 28 people found the following review helpful:

5.0 out of 5 stars Works as expected., August 19, 2011

By 

Sanjay - See all my reviews

Amazon Verified Purchase

This review is from: Sandisk 32GB MicroSDHC Class 4 Memory Card & MicroSDHC Card Reader (Bulk) (Personal Computers)

I was very particular to get SanDisk card only as i was advised by xda-developers site to get nothing else. Any SanDisk card, even if the class is 2 or 4 beats the other vendors by a huge margin. This is clear when you run a OS on the card. I am currently running the latest build of the Cynogen mod for Nook color from this card. Works like a charm.