Hi,
I cloned this repository then I built it via dpkg-buildpackage -rfakeroot -D -us -uc -i -b then installed the .deb package. I launched the application, it calculated the disk space (I had around 8.5GB of free), I didn't pick up any backup place. I left computer a while when I returned the screenlet showed 0 space and I noticed that some sync processes were running. I tried to kill the process but computer didn't respond. I restarted the computer but it wouldn't login. I opened computer via another disk and chrooted then removed some files to gain space. I uninstalled timeshift but won't find the location of backup place. There is no /timeshift directory. I also checked out /HOME directory there is no backup files. I wonder where it's gone 8.5 GB of space.
I found the backup location in /var/lib/docker/aufs/timeshift/ and deleted the files.
Timeshift should not be used on systems which have docker installed. It will cause various problems.