M1 question

Having Three External Drive all attached at the same time - Dismount each Drive before Force Shutdown.

Otherwise, the drives, if actively writing to the drive may corrupt All Data and or the Drives themselves.

Sorry for insisting on About this Mac image and thank you for that.

The confusion came in because Fitted seemed to imply something other than was appeared in User Profile iMac 21.5″, macOS 11.6

There are no 21.5" iMacs Fitted with a M1 CPU

Your system drive appears to be almost full - under 30GB for a 250GB drive.

This could be the problem.

Force the mac to shutdown by pressing and holding the power key until it shuts off.

Start the mac in Safe Mode: keep holding the power button up until you get boot options on your screen, and choose Safe Mode.

This will clear caches, do a system check and only load the essential components to boot your system.

Now it seems that maybe some cache file has grown out of hand, or there may be some large quantity of local snapshots that may be using a lot of space: that large dark gray area that represents most of the used disk space seems to "Other", which may just be other stuff, but also be something as I described above.

Check that space while in Safe Mode. Maybe some of it has been reclaimed, but most will probably not be.

Paste this in Terminal:

tmutil listlocalsnapshots /

what output do you get? If there a lot of snapshots, this may be easily cleared.

If not:

In Finder, press Command-Shift-G and paste

~/Library/

Select the Caches folder in there and press Command-I to open the Info window. How big is this?

Use Activity Monitor to see which apps are using your RAM the most.

See here for a guide - Activity Monitor User Guide for Mac - Apple Support

You can erase the Mac, copy out important files and reinstall OS

How to reinstall macOS - Apple Support

If your computer is fitted with M1 Chip it will appear as in below picture

Sorry but the wording in the description attached to your question seems a bit off.

Could you provide a Screen Shot of About this Mac without exposing Serial Numbers

The screenshot displays storage, not “memory” (RAM).

To restart your Mac, you can just force quit all running apps, looking at the size of the apps you are running you can just get a higher internal memory size iMac.

Something else may be wrong here. I see users on Youtube running the same app on M1 Macs and runs OK. I would run the free app Etrecheck and post here for review