> a one-time payment for an external hard drive may be a more economical alternative over time. If you care about your data, you are playing with fire. Drives do not store data forever. Data must be read and rewritten occasionally to maintain it, from old media past its lifespan to new media. Good storage software, with the ability to write your data with either mirroring or striping of some sort is able to routinely…
Also, there's nothing particularly "enterprise" or technically exceptional in backup software that can read old versions of files (for testing) while writing new ones (for current backups) and can copy old backups to new storage locations.