Problem when saving with the hard disk full

[repilo]

Hi, I'm using an automatic translator, sorry if this sounds rude.
I was editing a book and at one point I clicked on save and a pop-up window appeared saying that an error had occurred and that I had to close Sigil.
After several attempts, I ended up closing without saving the last changes.
Then I discovered that the hard disk had filled up and that was the cause of the problem.
I'm using Windows 10.
However, the worst thing is not that I lost the last changes, but that the epub has become unusable (it is less than half the size it was before, it can't be opened even if you rename the extension to zip). Although I have a copy from the day before.

So my request, if it's not too much trouble, is that when Sigil can't save the file because the hard disk is full, it throws a warning like: DISK FULL, EMPTY THE RECYCLING BIN! so that you don't panic and just go out to the operating system and delete useless files and problem solved.
Sorry if this sounds stupid, but it would have saved me a lot of trouble.