You can reclaim the disk space trashing the temporary Photoshop files.
- Press Win+R(Run command)
- Type %LocalAppData%\Temp in the type field.
- Look for files named "Photoshop Temp.."
- Delete it to free up some space.
You will not lose any data and you can even delete temp data for other programs.
Hope that helps.
Thanks! Found it!
>15 GB file, saved right before crash.
And now I've got one last, probably quite stupid question:
Can this file somehow help in recovering lost data (lost night...)?
The Photoshop auto recovery works when Photoshop crashes and that depends on the frequency of the data being saved, This can be checked in Preferences>File handling.
From the screenshots of your previous post, it seems Photoshop has been reset. If there is nothing in the Autorecover folder located C:\Users\usernam\AppData\Roaming\Adobe\Adobe Photoshop CC 2017\AutoRecover, It's not possible to recover lost data.