Keep files in trash: enter a number of at least 1
Admin settings rejected a trash retention amount below 1 or non-numeric.
Why this happens
Empty/zero/negative retention quantity. Cap is covered by the 3650 article.
Diagnose and fix
1. Enter an integer ≥ 1 (and ≤ 3650).
2. Choose unit: minutes, hours, or days.
3. Save again.
4. See Trash retention.