Originally Posted by Manolo
Dictionaries can be copied to the machine, just create Dicts folder.
Fonts can be copied with the unofficial file manager OTFM. So you can install first OTFM. But be careful with OTFM because as you can see system files you can delete/overwrite too!
I tried to copy new fonts to a "fonts" folder in the internal memory and the firefly sees them. So, apparently, no need to dig into the system files, for that purpose at least.