Hi there, I own a couple of Mac laptops both of which I use on nights at home as personal computers and during the day as pro ones. Is it possible to do Time Machines backups on a drive that is only accessible (should it be network or USB) at nights? Meaning I let TM do its backups hourly on evenings and have it completely unaccessible during days? How will TM handle this situation? I know I will not have that fine a granularity in my backups, I just do not see myself taking my 4TB NAS to work everyday and having to move around meetings with an external USB drive is not conceivable either. I heard it was possible to backup on a partition of the same drive that is being backed-up. But this is ridiculous for a drive as small as the 128 GB SSD of an MBA and it also is not very secure to protect against hardware drive failures. So! is my use case feasible? Thank you Edit: sorry if posting in this Lion section is inappropriate, I just figured that the fact that it is under 10.7 could be any relevant.