Default [Q] .thumbnails is huge, its growing and coming back every time

hello dear members,

i tryed to get rid of the .thumbnails folder (found on internal Storage - DCIM) because its that huge (3 GB) and every time i deleate it it slows down my Phone, the ZU gets really hot and that for about 10 minutes and after that the folder is back again containing all my Photos in a smaller version + an huge file that is as big as all the original Photos on my SD-Card. I would be very happy, if the folder would be history.

Does anyone has this Problem too and would help me, please? Thanks .