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SanDisk Ultra Compact Flash 4GB vs. SanDisk Extreme Pro CFexpress Type B 512GB + 9

Read speed
10 MB/s
1700 MB/s
800 MB/s
1700 MB/s
1700 MB/s
525 MB/s
160 MB/s
800 MB/s
1700 MB/s
160 MB/s
Write speed
9 MB/s
1400 MB/s
1200 MB/s
1480 MB/s
445 MB/s
155 MB/s
140 MB/s
Format
CompactFlash
CFexpress
CFexpress
CFexpress
CFexpress
CFast
CompactFlash
CFexpress
CFexpress
CFexpress
CompactFlash
Memory capacity
4 GB
512 GB
160 GB
128 GB
128 GB
256 GB
64 GB
256 GB
80 GB
256 GB
256 GB
Price/GB
6.5 £/GB
1.08 £/GB
2.06 £/GB
1.72 £/GB
1.73 £/GB
1.63 £/GB
0.8 £/GB
1.52 £/GB
2.53 £/GB
1.34 £/GB
0.91 £/GB