Just a quick few notes partly based on comments for today's GOTD, Backup4all...
Basically Backup4all is designed to back up your stuff -- photos, docs etc. If you have something really sensitive -- stuff that would be disastrous if someone else got their hands on -- you probably want to store that stuff in an encrypted container, e.g. a VeraCrypt VHD, and then store that container several places just in case. Most other docs and such don't warrant encryption, which you should remember is just something else that can break -- you *might* recover most or even everything from a bad .zip file, Unless it's encrypted. Plus a good password or key is just something else to protect & potentially lose. For biz you should generally use biz grade software as possible, e.g. one of the Azure or Linux enterprise grade databases, along with backup and disaster recovery to match. [It's really an entirely different ball game than encrypted zip files optionally copied to an external drive.]
The easiest way to back up your stuff, admittedly depending on just how much stuff you have, is to store it in the cloud, e.g. store everything in set folders you always use, automatically sync/save on OneDrive, and optionally, either manually or via an app or script sync/copy those folders to a 2nd cloud storage provider. 2nd up, Win10 can automatically sync folders to an external drive or USB stick. 3rd, if you want/need a bit more control, something like Backup4all might work just fine. For *long term* storage you probably want to avoid Blu-ray, and should be a bit cautious of SSDs & USB sticks. Compressing the files can sometimes help, but if you're storing a bunch of photos, videos, or MP3s, probably not. Compressing a bunch of smaller files into a .Zip file can speed file transfer to something like a USB stick. That said, compressing files, either in groups or individually adds overhead when you want to access those files, and makes it harder to verify which files you want and if they're in good shape. Storage is relatively cheap -- your time *might* not be.
Incremental backups are something that I've just never used, but it could be useful with an app like Backup4all *if* you use Backup4all as a utility to sync a copy of whatever folders, e.g. just add new docs. Personally I prefer simpler ways if all you want to do is sync a couple few folders, like Win10's built-in feature. Otherwise I prefer the redundancy of storing complete backups, since they don't depend on the integrity of earlier backups. Stuff happens, and if a backup isn't any good, for whatever reason, I can still get Most everything back from another backup archive.
Backup4all just does data backups, so the devs have added in every feature they can think of -- many [most?] folks wouldn't use but a small fraction -- and the Lite version on GOTD *should* work fine for most home users. You can find alternatives if you Google open source data backup, like this article from Tech Radar: techradar[.]com/best/best-free-backup-software . Of course you can just copy whatever folders to another drive or partition, internal or external, and if you have enough stuff to warrant it, disk/partition image backups work just fine -- they're more efficient if you want to back up a partition's worth of files.