Question about Link2Go USB 3.0 Converter for SATA

A small power supply unit is included in the delivery. You simply have to plug it in additionally.

Yes, for 3.5-inch discs you must also use the power supply unit included in the delivery. I can highly recommend this adapter. Absolutely top.

I can't say. I have only used the part for 2.5" discs. But I think that the power from the USB "socket" is not sufficient.