Preview offers PDF/A as an export option, intended for PDFs that are to be relied on long into the future, for archives. Do they comply with one of the PDF/A standards, though?
PDF/A
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.
Archiving is very different from backing up, from the storage media used to integrity checks. Here are pointers to help you preserve important documents.
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 