1- The bands are associated with your permanent MyDisneyExperience files.
2- There is nothing that needs to be done on the site regarding "using" the bands.
(The bands only come into play when you are AT a WDW park or resort.)
3- Yes, but as I said in #2, on the
MDE site there is nothing that is done regarding "using" the bands.
The new set of bands will work when you get to WDW...
AND, your old/current set of bands will ALSO work when you get to WDW.
You can use either or both.
Just to keep things as clear as possible-
There is no reservation info, or ticket info, or credit card info,
or FP+ info "put onto" a MagicBand.
The MagicBands just contain a unique serial number that is used
to access the information that is stored in your MyDisneyExperience computer file.
So, even if you were to lose a MagicBand, the info stays locked in your file.
Disney can just set up a new band (different serial number)
to access the info in your MDE file.
The MagicBand works like the combination to a locked safe, a key to a locked door.
Why does this distinction matter?
Because there is so much fear about losing bands and,
in turn, losing all of a guest's information thought to be on the band.
The MB, itself, is not the file of info or the container of the info.
The MB just unlocks the file of info to be read, when needed.