Files in the folder are not deleted, what could be?

Question

Debian

When writing a line:
find /data/backups -type f -mtime +3 -delete
Files are not deleted.
The files are already older than 5 days, not to mention 3 days.
Files in sql.gz resolution.
Not manually, not in a script are not deleted. What can you advise? Thanks in advance.

Answer 1

The user does not have permission to delete files. Try with sudo.
Or, for some reason, the partition is mounted as readonly.

Answer 2

ls -la /data/backupsto the studio