Assumption here is that the diary/journal is yours.
I would appreciate all the details ranging anywhere from the brand of SSD or external storage device you'd use to back-up, the kind of encryption to the general philosophy of maintaining one's privacy. I would appreciate if you would explain in great detail, how you would do it.
Another thing i would like to request of you is, if you could kindly share my query on r/privacy on Reddit. I for some reason can neither post nor comment anywhere in Reddit.
[Reddit has more people, i think more attempts would yield the best solution].
Fool wrote (edited )
How far do you want to go?
Multi-segment safe?
Journal encrypted on Ultradense disk, placed in safe
Disk drive placed in another section of the safe
Encryption key secured by HSM
HSM placed in another segment of safe
HSM key split into 3 pieces, placed in 3 segments of another safe
Keys for safe distributed across multiple hiding locations.
Too much?
Veracrypt on usb with both keyfile and password for two factor authentication.