Apparently, there's apps that don't delete their target="_blank">WinDirStat.) Then see if you still need that stuff, maybe back it up to your PC, and delete it.
It's a common problem by the way. Caused by the software being way too much dumbed-down, and having crippled operating system installed. Hopefully things will get better with SailfishOS, and similar actually open and full-featured operating systems.
Answers & Comments
Apparently, there's apps that don't delete their target="_blank">WinDirStat.)
Then see if you still need that stuff, maybe back it up to your PC, and delete it.
It's a common problem by the way. Caused by the software being way too much dumbed-down, and having crippled operating system installed. Hopefully things will get better with SailfishOS, and similar actually open and full-featured operating systems.