I believe the 730 comes with an Artlink CD that allows you to transfer designs from your computer to machine directly. But with the Bernina USB stick, which I believe also comes with the machine, you can transfer any .art design straight to the USB stick via Artlink or "Save As" feature. Ask your dealer about this. The USB stick has all the designs in the machine as a backup PLUS folders with more embroidery designs.
Editing .art designs in your machine is super easy and quite extensive. Rescale, rotate, add lettering with 11 different fonts, change the lettering baselines (arch, vertical, etc), mirror image, etc. Software can easily come later and then you can choose between Artista, which is pricey but SO COOL or you can opt for Explorations with is a neat program, available in 3 levels, starting at $249. I don't own Explorations but I think it is a great program for the $$.
Hope this answers your questions.
kim