I've been using an Apollo Cloud 2 Duo located at my workplace to back-up my home computers. I use Carbon Copy Cloner (CCC) to automate the back-ups. Several months ago, I found that CCC was no longer able to mount the sparsebundle files from our two MacBook Pro laptops (both running latest Mac OS) however back-ups from a much older MacMini, running an older OS (10.13.6) continued with no problems. I was receiving error messages in CCC stating that the sparsebundle file might be corrupt on the two MacBook Pros.
I brought the Apollo back home, deleted the sparsebundle files and started over again, on my local network. This worked just fine but after a month of smooth operation I took the Apollo back to my workplace and have been unable to back-up the two MacBook Pros - receiving the same error messages.
Why does everything work fine on my local network but only my MacMini, running an older OS, is able to back-up when the Apollo is located at my workplace?