Yes,exactly as you describe.

Following some to-ing and fro-ing with the team at FTM via e-mail contact,which included the advice to compact the files.
I manage 6 trees,5 smallish but one larger.After compacting, the smaller trees did complete but the larger one did not.
I was given some more instructions after following which, I was to contact them again. I have'nt so far,it was all taking so long,I think the staff must be working from home!
I have not tried to sync again in recently(in the last 6 weeks)I will.
Kim