Parity Check before creating backups

[GR3YH4TT3R93]

Importance:
5/10

Problem:
Currently the auto-backup feature runs after a specified cool-down period and sometimes starts backing up the server when no changes have been made (nobody was on).

Solution:
Check CRC-32 checksum before backups are made to be able to compare the current filesystem to the backup and abort if they're the same to prevent unnecessary downtime for backups along with hard drive wear.