I looked at manuals and it seems there are 2 version one with a card slot and the other manual referred to USB. If hers has a USB slot any of the free version will be helpful to move designs from computer to the machine. Some of the older machines would not accept anything higher then a 1 Gig USB. If it requires those special disks then she needs a dongle and the brother Basic program which is hopefully still available to download.
If the disk slot will accept floppy disks that would be easy too.
Thank you so much for the help.
Hope it actually will help