Hi and Welcome to the Community!
Here is a KB that discusses that:
- KB05478 Transfer files between the media card and device memory on a BlackBerry smartphone
As you see, it is rather tedious...one by one. It would be much more efficient to use the USB drive method, where your BB is tethered to your PC via USB, and then you use Windows (or MAC) to copy the files between the two additional drives that your system will then recognize:
Good luck and let us know!
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