aca3333 years ago000Is an additional power supply needed for old 3.5 sata hard disks or does this adapter take over the power supply for all HDDs?Show in original language (German)ungar.jan3 years ago+110 Helpful answerIt does not need an external power supply - it works with the adapter alone. greetings juShow in original language (German)CommentAnonymous3 years ago000The necessary power supply is included. The adapter is very complete and offers everything necessary.Show in original language (German)Comment