I never put my Macs to sleep and I also never keep my external drives plugged in all the time, either. I use them and then unplug them and put them away until the next time I need them. I also do not use Samsung’s security program or Apple’s FileVault. When I buy a new T5 first thing I do is plug it into the computer and go into Disk Utility and wipe it/erase it and reformat it to APFS. This removes whatever proprietary security stuff that Samsung has placed on their app and included on the device, removes the whole app. I don’t want it, I don’t need it. I wipe that stuff off right from the get-go. I’ve never used FileVault, never felt the need. I’ve never (knock on wood!) had any problems with my Samsung T3s or T5s.......