use rclone to delete all file type and except some of them:
* –exclude: do not delete these file type
* –rmdirs: remove empty folder
* dav:/Files: remote location folder which files need to delete
cli code as below:
rclone delete dav:/Files --exclude '*.{pdf,doc,docx,odt,ods,png,jpe,jpeg,key,jpg,xls,xlsx,tif,tiff,heic,heif}' --rmdirs
