This is a lesson learnt, never trust IT, where I worked IT had backups of everything on servers as well as nightly backups of them, although against their wishes, I made two copies of all the software/drawings etc. on two portable hard disks, one I kept at work, the other at home, went to them one day as I needed a backup file off the servers, it appeared it had been removed somehow I know it was there & apart from IT I was the only one with access to that folder, noticed a few others gone as well. So me keeping backups personally ensured that I could restore them if needed, My regime was to back up to the server & the portable drive at work (keeping the last 3 versions at the minimum), the drive at home was only backed up with modified files but 5 days later.