Auto delete. Auto delete. Auto delete.  That is what low cost backup providers do with your backed up data.  They automtically delete enitre backup dates, leaving you with one backup date from your last 30  backups - called "pruning".  They, also delete individual files.  Why?  Because, "the files have been backed up to many times".  Thus, leaving you with 1 backup (date) of said files.  Lets not forget, zero restore tests performed by low cost providers.  Successful restores at crash time, are tied directly to restore tests, which are tied directly to your business survival.   No ifs, ands, or buts about it.