> Every last weekend of the month, I will manually backup all the data to Blu-ray discs. Not once, but twice. One copy goes to a safe storage space at home and the other one ends up at a completely different location.
This is one paragraph after mentioning a 2TB+2TB NAS. Even assuming that's RAID1, a standard Blu-ray only stores 50 GB, so you need 40 of those. And then you need another 40 for the other location... every month?? Honestly it's probably cheaper to buy a new 4 TB hard drive every month.
If you're a cheapskate like me, backing up your encrypted (e.g. Borg) backups to a cloud provider like Google Drive isn't a bad option. My org provides me with unlimited cloud space, so I have hundreds of encrypted gigs on Google Drive. No reason to think it'll disappear overnight.
> it's probably cheaper to buy a new 4 TB hard drive every month
The reason for blurays might be that he's following rule 2 of the 3-2-1 Backup Strategy. 3 backups, 2 different types of storage media, 1 copy off-site.
If your house is hit by lightning it could wipe all your magnetic and solid state drives, but optical discs would probably be ok.
Most definitions of the 3-2-1 rule count the original data as one of the 3 copies [1][2][3] and don't go as far as to specify that you should be diversified against literal medium type. (Most recommend an external drive or NAS for your second local copy)
The "my house was hit by lightning" case is covered pretty well by your 1 offsite backup.
> Every last weekend of the month, I will manually backup all the data to Blu-ray discs. Not once, but twice. One copy goes to a safe storage space at home and the other one ends up at a completely different location.
This is one paragraph after mentioning a 2TB+2TB NAS. Even assuming that's RAID1, a standard Blu-ray only stores 50 GB, so you need 40 of those. And then you need another 40 for the other location... every month?? Honestly it's probably cheaper to buy a new 4 TB hard drive every month.
If you're a cheapskate like me, backing up your encrypted (e.g. Borg) backups to a cloud provider like Google Drive isn't a bad option. My org provides me with unlimited cloud space, so I have hundreds of encrypted gigs on Google Drive. No reason to think it'll disappear overnight.