Well seen, that's the problem.
The SD Card is a 16 Gb size.
There is a Raspian and Libreelec installed on it.
LibreElec use 100% size = 4,6Gb. I thhougt it was thinner than that.
I removed some jpg files into thumbnails folders, but it freed only 200 Mo.
4Gb is it a normal size for LibreElec ?
I haven't nothing stored locally on SDCard except the system with 3 or 4 addons.
Is there some others files that can be deleted as for exemple updates packages previously downloaded ?
Regards