Thank you for your post
In my case i need to store backups every day and to delete it if it's older, than 7 days. I think it's more readable for the system and for user to have it like i did. Then you have server ID, and a day, when the backup was made. If you will get a problem with your server after an update, i will be easier to restore files with date in the file name , than to guess, from what date was the backup made ( yeah, i know about date in the file info, but it's allways possible that the fil will be rewrited or changed... You never know. ).