Question about 870 EVO - 445722

Hi Now I had to connect my 870 Evo to my PC with an adapter housing (Sata 3.0 to USB 3.0), as I have no other options. The Samsung Magician also recognises the hard drive, but it does not work. On the Samsung site it said that the cable might not bring enough power (the cable brings 0.9 A). Question: How much power (amps) does the Evo 870 need? Thanks in advance.