Deleting files does not free up space - please help

[Pulmolllover]

Hey, thanks everyone for being here! I'm new and at first I hope I created this Thread in the right place.
I have a 2013 Macbook Pro and my SSD does no longer free up space, when I delete files. I have tried to delete local snapshots via terminal. When I listed them in terminal afterwards, there were none. I have deleted files from the cache-folders, I also have looked for hidden snapshots with CCC. When I try to use time-machine it says, it cannot backup, because there is not enough free space on the source-volume. But - as I said - I can no longer free up space.
Please help me find the reason.

Isn't it strange, that DiskWave doesn't list 248 GB, but it shows this number as "used space"?

Thanks for your help and kindest regards from Germany.

 

[Gregg2]

So the TM backups are going where? (that would be the "target" volume, I think)

 

[Pulmolllover]

Unfortunately not, they are going to an external HDD.

 

[ssmed]

Thanks for your help ...

Is it a third party SSD and have you enabled TRIM via an appropriate Apple OS version or 3rd party application?

 

[Pulmolllover]

Could you help me find out? In the meantime I do a research about what you said about TRIM.
[doublepost=1552827030][/doublepost]Ok, got it, but it seems like Trim is on and it´s no 3d party SSD.

 

[ssmed]

No you have an Apple SSD and you should not need TRIM to be enabled as you are running a new OS. I suspect you will have time machine snapshots on your disk which are filling it up! I would do some research on that side - frankly they are a pain. CCC will also do this, but is much easier to turn off!

 

[Pulmolllover]

Ok, thanks!
I have disabled and deleted local Snapshots already, Terminal says there are no Snapshots on the SSD.

 

[ssmed]

Ok, thanks!
I have disabled and deleted local Snapshots already, Terminal says there are no Snapshots on the SSD.

in Disk Utility does it discuss state in the Available Box that xxGB is purgeable?

 

[Pulmolllover]

It says 56,5 MB purgeable.

 

[ssmed]

It says 56,5 MB purgeable.

Then I don't know. If faced by this without an answer I would tempted to wipe the machine and start again, but that is huge job. Perhaps a trip to the Apple store is needed. You could perform Apple Hardware test/Apple Diagnostics as a precaution.