Hi Bondia -
That page is very helpful. However, even after reading it, I'm not sure what you mean by "your photos are not duplicated in an iCloud backup." Can you explain that to me in a really basic way? What is an iCloud backup?
JJRASC was referring to iOS and iPadOS device backups that have an iCloud backup feature. Mac computers do not.
I do use iCloud Photos and I like to store my originals on my Mac. This works fine except I'm running out of room on my Mac. Also I've recently digitized, and edited with iMovie, some old VHS home videos. Those take up so much room I can't keep them on my Mac and I have to keep them on an external hard drive
I think what might work best for you is to purchase a large external solid state drive (SSD) to store your large Photo and iMovie libraries on, along with the final copies of your projects. That way, you can configure Photos to download originals to your Mac, without using any storage space on your Mac's startup disk. Additionally, you can edit in iMovie, without worrying about using a large amount of disk space on your Mac.
Apple has documentation on how to accomplish this:
An excellent external SSD choice for this task is the OWC Envoy Pro Elektron - OWC. When you receive it, erase it, and format it as APFS:
Erase and reformat a storage device in Disk Utility on Mac - Apple Support
You can then add this external SSD with its contents to your local Time Machine backup going to the other external hard disk you stated you use. To do this, verify the external SSD is NOT on the exclude list:
Exclude files from a Time Machine backup on Mac - Apple Support.
If you need a larger Time Machine drive for this, a very large, high-performance, external desktop-class hard disk would serve you well: OWC Mercury Elite Pro - OWC.
I'd also like to back up with a cloud service.
To backup everything to the cloud, unfortunately, iCloud does not offer the ability to store copies of the contents of external disks. However, a third-party service, such as Backblaze, does. With Backblaze, you can backup the contents of your Mac's startup disk and any data on external disks to the cloud: Backing up External Hard Drives - Backblaze Help.
Doing all of the above would in the end accomplish the following:
- free up storage space on your Mac
- create a local backup of all your data
- create a cloud backup of all your data
I hope this helps!
Jack