BackupDiskFile::CreateMedia: Backup device ‘D:\\backup\\drm_server20220114.bak’ failed to create when the database is automatically backed up. system error 5 (Access denied.) .” Error.

Solution: Right-click the folder à Properties à Security à Group or Username, see if there are Authenticated Users in it, if not, click Edit à Add à Enter Authenticated Users à Check Name à OK à Add Modify Permissions