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Can anyone suggest how I can appropriately split the files across the 2 drives?


When using (j)emplode, it's the player that decides on which drive a fid ends. The player knows the disk usage of both drives while the transfer is going on, so it probably takes the drive with the most space. This is as efficient as you can get.

mp3tofid cannot know the disk usage of the drives where the fids will end up, so it has to make a guess. You can specify the percentage of the number of fids that will be placed on the second drive. This does not have to correspond exactly with the percentage of disk space used, but it is close enough to allow you to fill both your drives to the limit.

Pim