Hi all! Thanks for excellent teardown and instruction.

Have just added a 8TB 3,5 "Seagate Archive" drive today in the A1470. Works like a charm.

Backup resumed and "infinitive"..

But, trying to access and move the old files from the original 2TB to the new one.

What drive format is Apple using for the AirCapsule drive?

Put the SATA disk in a "toaster" and connected USB to both MAC and PC.

Cannot access drive. But when connecting USB back into AirCapsule I can se the files but receive "unknown error -8084" when trying to copy files.

Any suggestions how to access old HD?