SanDisk Ultra CompactFlash memory cards deliver the ideal combination of reliability, value, and performance for casual photographers with entry to mid-range DSLRs. Choose from a range of capacities up to 32GB to do more without worrying about running out of space. Capture the moment with ultra fast shot speeds and save time moving files to your computer with transfer speeds of up to 25MB/s (4GB); 50MB/s(8GB to 32GB). For dependability and solid performance, you can count on SanDisk Ultra CompactFlash memory cards to capture and store your favorite pictures and videos. That's why for memories that can't be missed, photographers worldwide choose SanDisk. Up to 50MB/s read speed; write speed lower (8GB-16GB). Up to 25MB/s read speed; write speed lower (4GB). Based on internal testing; performance may be lower depending upon host device. 1MB = 1,000,000 bytes. 1GB=1,000,000,000 bytes. Actual user storage less. Full HD (1920x1080x30fps), 3D or 4K video support may vary based on host device, file size, resolution, compression, bit rate, content and other factors.