Honestly, this is the best option for 99% of small businesses, the synology NAS boxes when configured correctly are incredibly resilient against being hacked, and the automated backup options included just work, period.
We have a 4 bay synology at the shop that serves all our files to 10 different computers without any lag or slow down at all, when we save a file, it automatically makes a copy on a second HDD inside the unit, syncs the file to google drive and onedrive, and every night makes a true backup to backblaze.
You can set them up to take hourly snapshots of all files, and not to allow those files to be deleted or modifiedfor x number of days, by anyone, even the admin of the NAS, this means your files can not be encrypted in a ransomware attack. It also means when i mistakenly hit save instead of save as, I am able to quickly revert back to the file I saved over as it keeps multiple copies automatically.
I can also access all my files on my phone or laptop from home using tailscale, which is an encrypted VPN that is free to use and extremely secure.
I'm really happy we switched to the synology NAS, it's made my life much simpler and I fell much more confident that my files won't disappear. I've talked to other shop owners who have all of their files on their 10 year old laptop, with no backups, that shit scares me!