SFV is a file to verify the integrity (checksums) of RAR files, named sequentially R01, R02, R03, R04, etc. (or .001, .002, .004, etc..).
How to read a SFV file?
The SFV Checker software can check all files of a multi-volume archive and tell you if any of them is corrupted, has an incorrect size or is missing.
To decompress RAR, just use one of the following software: