If it were me:

1) Update to Win10 ON NEW DRIVE - get it all done - all updates.
2) copy 100% of the \BB and \RB directories from old SSD to new
3) THEN install 2019 on top of whatever version you have now.

OR

Only do step 1 then
make old SSD just another drive (make sure it is not longer a boot drive) and LEAVE BIAB there and simply install BIAB 2019 over it - no need to move anything at least from the BIAB \BB and \RB folders


Others will jump in with other suggestions as well I'm sure

In any case, good luck
Larry

Last edited by Larry Kehl; 08/18/19 11:58 AM.

Win10Pro,i9,64GB,2TBSSD+20TBHDDs,1080TI,BIAB'24,Scarlett18i8,Montage7,Fusion 8HD,QS8,Integra7,XV5080,QSR,SC-8850,SPLAT,FL21&others,Komp.14,IK suite&others, just a guitar player-AXE FX III &FM9T, FishmanTP, MIDIGuitar2, GK2/3'sw/GI20