TM backup disk: how to make sure it ejects

[Change Agent]

I have a USB SSD connected to a Mac Mini in my network (everything is hard-wired) that is set up to be a Time Machine disk for one of my computers (a M1 MBP).

Often after the MBP sleeps, I get a message that the disk was not properly ejected. Can one make sure that as soon as TM is finished with the backup, the disk gets ejected?

All Macs are on the latest OS.

Thanks.

 

[Bigwaff]

Often after the MBP sleeps, I get a message that the disk was not properly ejected.

Even though you see this message, does TM still execute backup over network without issue? Or do you have to manually mount the SMB share again?