Backups are for recovery, while archives are for posterity. Plan for the future now by storing important files on durable media in your personal archives.
DVD
Archiving is very different from backing up, from the storage media used to integrity checks. Here are pointers to help you preserve important documents.
How to design a method which not only detects errors in file data, but enables them to be corrected? A tale of Hamming, Reed, Solomon and CDs.
So many different types, from read-only disk image .dmg files, to sparse bundles and DVD/CD-R masters. Which to use, and how to create them?
First release version, for El Capitan to Catalina. And completely free of course.
Other major changes include detailed reporting, and user control over the size of buffer used, bringing big performance improvements.
How can you tell whether the file you see in storage today is the same as it was a year ago when you last opened it?
Because of its glorious past, Apple is about the future. But just now we need our past, with the future looking so uncertain.
Over time, stored data gets gradually corrupted. But over what period – months, years or centuries? And at what rate?
What do you do with all those old but important documents? Do you just leave them cluttering up storage, or have you archived them? Here’s how to archive properly.
The Eclectic Light Company 