I have two accounts on my IMac – one for secure items and one for general computing – I created a Knox vault on the secure account and backed it up on an external drive in a Knox vault – I could not open the Knox vault on the external drive from the non-secure account on my IMac – it would therefore appear that if something happens to IMac, the backup on the external drive would be useless – am I correct or did I do something wrong?

No, Knox vaults can be opened on any Mac and any account with the right password. What happened when you tried opening the vault?

It says that I don’t have sufficient access priviledges

I may have solved the problem – the vault on my external drive had not been dismounted from my secure account – once I dismounted it, I was able to open it through the other account

By the way, I read on one of the postings that someone had to reformat their external drive to a Mac format to make Knox work – I have been using my Seagate external drive which I also use for my laptop PC – I use another Vault program (Cryptainer PE) for the PC – I did not have to reformat the drive to use Knox – both seem to be working fine although I probably will not be able to use Time Machine

The problem with FAT (PC-formatted) partitions is a 4GB limit on file size; you can’t store more than 4GB on a single vault on such a drive. Other than that, they seem to work fine (although we still recommend using HFS+ drives).