- Plesk for Linux
While accessing the Backup Manager at Plesk > Tools & Settings > Backup Manager the following warning can be seen:
Warning: Some of the files in the FTP storage are not shown in the list because the names of those files do not conform to the naming convention of backup files. If you are sure that those files are valid backups, rename them to match the following pattern: "backup_<YYMMDDHHmm>.tar"
Files, which are not related to Plesk backup, are stored on FTP server in the same folder as Plesk backups.
This is an expected behavior. FTP storage that is used to store backups should not contain any other files and archives.
Remove or move other files from FTP storage folder.