Recover a backup of a file on the O, U, or M drive
Backups of the network drives (O, U, and M) are taken at approximately 10:30 PM every day. You can access these backups through the Previous Version option in a folder's properties. If the file was created,or you need a copy of the file since the last backup was taken (i.e. a copy of the file from earlier in the day, not the previous day), this option will not be able to restore your file.
Around one month worth of daily backups are retained and accessible on the system, although there may be additional days kept in some circumstances.
Recovering a Previous Version of a File
To recover a file: -