[newbie] Error Code 87

[mikewillnot]

Just getting the hang of this program [and the forums; I may have originally posted this in the wrong one].
I'm getting a number of errors like this:

Cannot write modification time of "H:\Mike\Documents\a -- ELECTRICAL data\ARCHIVE INVOICES\MW inv 20160502 - Borelli~8502.ffs_tmp".
A FAT volume can only store dates from 1980 to 2099:
write time (UTC): 1/1/1970 12:00:00 AM (116444736000000000)
Error Code 87: The parameter is incorrect. [SetFileTime]

I looked at the files in question, and all modification dates seem to be within parameters.
I don't understand what it's telling me, and therefore can't figure out how to fix.
Any suggestions would be GREATLY appreciated. THX

[xCSxXenon]

If possible, it would be easiest to format as NTFS. That would solve the problem and be better going forward. FAT is pretty outdated