No such problems on a Mac (even if Time Machine is running using a partition on the drive). However, I find it almost impossible to eject the drives under Windows 10-it is always 'in use' (either because of Dashboard, or Windows Backup, or Norton Utility and I have to shutdown the machine to remove it. Download: STORAGEBIRD External USB Drive Firmware The download is a ZIP file which will have instructions on how to start the firmware update procedure. I had the 2TBs for over a year and they perform well. Please verify your STORAGEBIRD external USB drive Seagate model number and serial number using the USB Drive List software. I also have the 4TB Backup Hub and it is very bulky in comparison (its advantage is it has its own power and can connect other drives to it). Please note that there are many Seagate 4TB models, and not everyone is a slim one (the box DOES NOT say it is slim, but it is if you have the Model STDR40000100. The bootable program, Western Digital Data LifeGuard Diagnostic for DOS, is a text-only program, which means you cant use your mouse to navigate around it. The 4TB has the same footprint as the 2TB, only a bit thicker. Now I can simply take the drive on a trip and boot up any iMAC. It is certainly not the fastest drive but good enough for my day-to-day archiving purpose as well as running it as a boot disk on USB (even USB 2.0 on a 2009 iMAC (whose internal HD died, and buried inside since I don't want to open the iMAC).

The Backup Plus Slim series of HD are excellent (I have two 2TB and 1 4TB) and affordable.

Seagate drive utility