> I have 107 Gb (10.000 song) of music, I ripped many cds, I gave to my friend i think 1.000 songs of many various artists
> Every artist has a folder, most of the songs I gave him was one song by one artist, In his pen drive all songs its mixed Together
That won't matter if all the tags are present, and you have auto-organise set-up well.
When you import them back into your library, they will be put back in the proper location.
> I can't make a pen drive appearing under Computer node instead of Devices node. Is it possible?
> If it's under Devices node, drag & drop correctly copies songs from the library.
> But what happens when it's under Computer node? Does it move files from the library?
> Looks like it when I tried between different partitions under Computer node.
> If that's the case, shouldn't it copy when songs get drag and drop between different drives?
My modern 32Gb pendrives appear under the computer panel.
I tried with an older 12Gb one and it appeared under the devices panel, as you describe.
So I did some research, and it appears that many pendrive manufacturers have switched a bit flag on their drives which turns them from a 'removable device' into a 'fixed drive'. The reason for this is to do with Windows 8 'to-go' feature:http://technet.microsoft.com/en-us/windows/jj737992
This is a 'new standard' for removable drives which Microsoft is pushing. Some manufacturers are bending to the pressure, and some aren't, and a lot of current 'bootable' software doesn't work on the new drives.
There is an inconsistency in Musicbee regarding this behaviour. Dragging to the Computer pane moves by default. Dragging to the Devices pane copies by default. So you have to be aware of what you're doing and press CTRL to toggle the action.
However, I would argue that this inconsistency is intended. In the Device panel you almost always want to just copy songs from your library to the device (or vice versa). Whereas in the Computer node, you are more likely to be rearranging your folder structure and moving things around.
My advice is the same as in my previous post - look at the cursor, and use CTRL or SHIFT to toggle to the action you want, because the list of different types of 'location' are growing, and so is software interactivity, so it is getting really difficult to predict what dragging action will be performed in any particular circumstance.