same problem on a 3s. 1tb no go, 0.5tb and 0,25tb work. all with an identical case (electronic).
It might be that the 1tb needs more power than the usb port can handle. You might try an y adapter with 2 usb ports to draw power from both ports but the signal is just connected to one port – or use a powered hub, that should work.
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1981 soldered my first Sinclair computer 1K, tapedeck * 1984 build and sold IBM clones 8Mhz, 512K, 20MB HDD * 2018 messing with ultrabooks