by Séverin Terrier.
Hi,
You mean that you're saving all files in moodledata folder to make a Moodle backup?
You can ignore saving (and/or empty) these folders : temp, sessions, cache, localcache
trashdir just allows to recover files deleted in the last 24h. If you're sure no files are concerned, you can also ignore/empty this!
HTH,
Séverin