IMHO, there's nothing wrong with the interface! It's what you do with it that counts ;)
Deckard007 wrote: A video explaining where to start would be just awesome! Please? Also all these sounds at JP-80.com, is it the same process for those?!
To be honest a video wouldn't help you much as it's more about the logic than which buttons to press.
The first thing to understand is how the JP-80 reads from the USB stick. It reads from only one folder called ROLAND. In there are two folders, BACKUP and SOUND.
The BACKUP folder holds the data when you use the BACKUP routine in the system menu - it is also used when you use the RESTORE routine. These files hold ALL sounds.
The SOUND folder holds sounds you select for export. It is also used when you want to import sounds.
That said, this is where the head-scratching starts (due to lack of a librarian). If you want to import a sound set (from the SOUND folder) there may not be enough room for the required livesets and tones. So you have to delete some to make room. But (as you have found) it is almost guaranteed you 'break' other Registrations/Livesets that you want to keep.
This is why I created the 'Blank' soundset at JP-80.com.
However - again this is difficult and has to be carefully managed - the JP-80 only reads from one folder called ROLAND. For example I have the v2 sounds, the v1 sounds and the Synth Legends which are complete soundsets. So I have three folders on my USB stick - ROLAND (which holds my current V2 sounds plus my own creations). Then I have a 'ROLAND - v1' folder and a 'ROLAND - SL' one. If I want to load up the Synth Legends (SL) sounds then I first rename the current ROLAND folder to 'ROLAND - Main' then I rename the 'ROLAND - SL' folder to ROLAND. I can then use either the import or restore functions to load the sounds up and overwrite the currently installed sounds. And that's the dangerous bit - get this process wrong and you will overwrite your sounds with no way of getting them back (which is why I have three backups of my USB stick!).
So those are the two fundamental logic elements - folder structure and folder naming and management.
The 'blank' soundset I mentioned above will overwrite everything (apart from SN acoustic tones) and give you a blank JP-80 which you can then import new sounds to your heart's delight. With careful management you can have many 'ROLAND xx' folders which can be renamed to ROLAND whenever you want to use them.
But proceed with caution and backup everything, everytime you play around with import/restore. It's the only way to do until there is a librarian, about which I hear conflicting thoughts about so only time will tell if we ever see one - I remain hopeful that we will indeed get a librarian so we can have a better sound management process.
Does this help at all Deckard007?
PS - yes, it's the same logic for all sounds including those at JP-80.com