"Unfortunately, I got the following error message after about 240 GB:
'The backup task was aborted because the source filesystem is not responding.'"
I'm wondering if there are problems with the internal drive... not so much "speed"... but hardware-related.
Before going further, I would:
1. Boot from the INTERNAL drive
2. ERASE the external SSD (APFS with GUID partition format)
3. Open CCC and try cloning the internal drive one more time.
If you get the same error, perhaps another approach should be tried...
'The backup task was aborted because the source filesystem is not responding.'"
I'm wondering if there are problems with the internal drive... not so much "speed"... but hardware-related.
Before going further, I would:
1. Boot from the INTERNAL drive
2. ERASE the external SSD (APFS with GUID partition format)
3. Open CCC and try cloning the internal drive one more time.
If you get the same error, perhaps another approach should be tried...