I want to keep files that are regularly kept on iCloud backup on my computer (iMac). Are there any problems in doing this? I am forever a total novice, but I can operate KM. I am just asking if this is a reasonable task for a novice who can do no programming.
Ultimately I need a folder of Markdown files that are kept on iCloud to be frequently backed up on my iMac so that I can index those files in Devonthink 3.
Backups are so important that I think it is always better to use dedicated software to manage them rather than try to write a program yourself. I have used Chronosync for years both for work and for home backups. It can do everything you need including running very specific backups at certain regular intervals. It has a smart backup feature which means only changed files are recopied as well as lots of other features that make it reliable and safe to use. I'm sure there are other backup Apps for the Mac too that others can recommend.
Of course, both iCloud and Dropbox are a kind of backup as they store your files in more than one place. But always good to have other backups too.