fast (200MB / s), SSDs work without power supply

The read and write rates are also excellent manner. Here I read 10GB test data only ...

dd if = / dev / sdb of = / dev / null bs = 100M count = 100
100 + 0 records a
100 + 0 records out
10485760000 bytes (10 GB) copied, 50.4057 s, 208 MB / s

... And then wrote:

dd if = / dev / zero of = / dev / sdb bs = 100M count = 100
100 + 0 records a
100 + 0 records out
10485760000 bytes (10 GB) copied, 44.1041 s, 238 MB / s

The values ​​are perfectly adequate for a USB-SATA adapter, especially when you consider that most probably no SSD but a mechanical hard drive is connected, the currently max. 150MB / s supplies.