High Sierra

[mhoutman]

Originally Posted by dnanian

Right, so you have to delete that partition, and then create one for the APFS container. Or format the whole drive for APFS. It's up to you.

Note, though: Time Machine grows and takes over the entire space given. If you have a shared pool of storage and don't set a quota, Time Machine will eat the entire drive.

Dave, thank you !

Time machine may grow as it is on a separate partition and f the partition is 'full', old TM entrees are sill deleted right ?

For safety reason I might be better to erase the SD clone partition only; than is the TM partition still there