My iMac won't start from an external drive?

Question

iMac

Good afternoon. This is a question for you - do you know the answer? I have an iMac (macOS Catalina 10.15.7) and an external Samsung sd drive with exactly the same operating system. The system on the sd disk worked for 1 month and now it has started to fail. The meaning is this - it starts from an external disk, starts, and then the disk spontaneously turns off. I sinned on the disk, but it seems to me that the matter is not in the disk. Tell me if you know.

Answer 1

Good afternoon, try changing the cord or the entire pocket assembly, if it doesn’t help, then change the disk as well to exclude the disk option. If these options do not help, then perhaps the moment is in the usb connector in the poppy. As long as I see this