CF, MS, SM, SD, MMC, XD, the volume (not capacity) of the card decreases from left to right.
padre
Compact flash lamp
There are two specifications, CFI and CFII. The difference is basically in parameters and specifications, which is of little significance to ordinary users. But don't worry, there are many basic CFI's on the market, and CFI's backward compatible, which means you can insert CFI by using CFII. Now you can basically take two kinds of DC with CFI card. Just buy CFI.