Hi,
Just a quick update, store commander have changed the way the free version works. It used to be limited version free but now it is full version limited to 30 days.
Both these modules are capable of doing what you require do not let store manager staff sway you by hijacking the thread, which by the way I do not appreciate. I was trying to offer impartial advice but store manager staff must have seen it!!
The main difference between the 2 is store manager is licensed per machine so you have to work on the same machine, store commander runs on the site so you can use the software from any computer and any operating system, even have multiple people using it at one time!!
Anyway, they'll both let you try for 30 days to get the big upload done, after that the choice is yours whether or not you buy!
Clint