In a way, the subject covers most of it: " Using a USB hub with 3 computers, 1 printer, 1 external drive (for backup for any of the three PCs)".
I don't know much about USB hubs, I guess all of the ports are two way. To clarify, if needed, I'd like to buy a 5 (or more) port USB (3.0) hub to connect 3 PCs, 1 printer, and 1 external drive such that I can print or backup from any of the 3 pcs. I suppose there are two questions: 1. Should I expect any problem "hardware wise"? 2. I suppose I have to consider the mounting of the partitions on the drives, I suppose it would be a bad idea to have the same partition (or even drive) mounted on more than one pc at the same time? (And I guess I'd have to avoid printing from two computers at the same time.)
