I'm trying to pre-emptively avoid permission issues on my portable USB hard drive. The plan is to put a couple of Virtual Machines on the portable hard drive, and use it between two PCs both running Mint 17.2 + VirtualBox.
Both PCs are mine, and have been configured with the same username and password (not sure if that makes any difference).
I'm keen to format the hard drive as Ext4 for best support and performance. But, my concern is permission issues may come up between the two PCs. Alternatively, I suppose I could use NTFS but I don't know whether NTFS might have similar permission issues in Mint.
I've looked at exFAT, and I know fuse-exfat works well (I use it for Windows USB sticks), but for Virtual Machines I suspect Ext4 or NTFS would achieve better performance (least CPU overhead).
Any advice would be much appreciated.