It's the group problem that is the disadvantage of the mind trick. Sentries are fine but with groups of guards its simply not credible to do the lot, much as you can really confuse them by doing their leader.
Ok, I will specify a few things:
The droid will ONLY move the drive at the direction of sales staff or in an emergency; you won't change that so you will need to either impersonate the sales staff or somehow turn the fact that it will move it in an emergency to your advantage.
If the guards get through you are pretty shafted so get out before then
I hate to really hint, but I said earlier that Galder was not powerful enough to lift those drives. I said nothing about Takuan. At this point, though, it would take him too long to take all the drives to the ships but that does mean that if you get the drives to the right general area then with Takuan using the Force and Chion and Rura using their muscles you can get the things the short way to your vessels.