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Online Internet storage issues:
Privacy
Security
Company continuing to exist or provide it free or provide it at all. Amazon & MP3s?
Needs Gbps Fibre
Internet not always available
Internet not everywhere
Magneto-Optic storage was good, but capacity stopped growing and products dead.
Backups need verified, at least one needs to be stored off site (not as Cloud version) and may need checked/refreshed. Don't overwrite a backup unless it's a copy!
DVDs, SSD and USB or SD Card memories are all less robust than tape.
Not all spinning disc HDD are suitable. Avoid too high density, helium or shingled drives.
Do not leave backup media connected.
RAID or Clusters are methods to reduce downtime or increase availability, they are not backups.
To avoid time delayed ransomeware do two things:
1) Have a test PC that's not on LAN or Internet that you check backup on, that it's not already encrypted.
2) Make sequential backups on different media that is put in storage.
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