What is Sfcache File format
sfcache is associated with ReadyBoost cache memory file. You have chance to see these files on your flashdisk by making right click.
sfcache extension stands for cache memory files. If you need to see these files on your disk or flash disk, you should make right click and select features option. Then come to "ReadyBoost" section. Readyboost makes is to speed up your computer (not enabled by default). You may choose what you want.
Related software about Sfcache files.
Sfcache file software links.