My10.rar -

might refer to a "My 10-Year-Old" reading list or guide curated by this community.

is a common naming convention for personal backups. MY10.rar

could refer to a "My Top 10" personal collection of games for a specific system, like the Game Boy Advance or NES. might refer to a "My 10-Year-Old" reading list

In some tech forums, users discuss creating archives like this with a . MY10.rar