If Plan A is backing up and continues to the point that Plan B is scheduled to start, will Plan B start and run concurrently with Plan A, or will Plan B wait for Plan A to finish? For that matter, what happens if Plan A is backing up (as I am doing now manually - the initial backup of almost a terabyte of information) and runs up to the point that the same plan (Plan A) is scheduled to start?

I'll chime in with the same problem as well - the algorithm and vaguely-defined parameters make little sense. Is the percentage based upon data size, number of files or estimated time? And with a total size of 917 GB and 98,087 files to backup, the MSP360 backup progress window shows that 26,914 of 26.921 files are backed up - and both numbers just keep climbing. That's rather useless information, but if it mentioned that 26.914 files of 98,087 files were backed up, it might make more sense. It also tells me that 10 hours have elapsed since the backup began (true) and that 11 minutes remain (quite unlikely.)

seeing up mite plans = setting up more plans

Considering that all my data can be backed up with either multiple plans for each share or a more expensive single plan covering multiple shares, is there any real functional advantage to the latter beyond convenience in seeing up mite plans and schedules?

Unfortunately, I'm stuck with a separate plan for each network share (4 of them on my NAS.)