Mac Studio M1 & SSD external Drives Disconnecting

I too have had issues with external USB connected solid state drives on my Studio M2. I have tried several brands and formats. They all disconnect at some point. I tried not letting the computer sleep, formatting to different types, different connection schemes, etc. Same results. I have been able to use motorized external hard drive with no issues. Perhaps there is a current sense on the USB port that turns it off when little or no current is sensed? I believe it is an Apple problem?

Within a few weeks, a Raid and shortly afterwards a BM Ultrastudio, which were connected via Thunderbolt, broke down. The raid connection was irrevocably destroyed. The Ultrastudio simply stopped working. Remains switched off. (MacStudio M1 Ultra)

What are the external HDDs, now SSDs being used for?

(for backup, extra storage, both)

Are you using the front ports, rear ports or a combination of both?

(please elaborate on the 7 inch cables)

Have you noticed any activities that causes the SSDs to disconnect and reconnect?

(for example log-out/log-in or computer sleep/wake)

There have been reports of Bus-powered drive enclosures that do not work happily across Mac sleeping, especially more recent Macs with Energy-star certification. When sleeping, a recent Mac reduces the amount of USB power provided to a 'standby' level. Some drives do not take this gracefully, and instead just disconnect.

Turning off sleep is a possible work-around, but may not provide complete resolution of the problem.

Supplying external power to the drive enclosure seems to be an effective work-around for some of these cases.