To back up sound banks to your PC using D50 Librarian
1. un-protect the memory of the D50.
Press Tune/function . The display will flash. Change it using the joystick ... move to left.
2. press exit
3. check MIDI settings (default = ch 1)
I'm using DIN 7
4. press exit
5. Press "data Transfer"
Hold Data Transfer & press "B Dum" simultaneously to select "one way Transfer"
You will see this message.
Press enter

6. press exit ... you should see your sound bank on the computer.
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To transfer a sound bank to the D-50
1. un-protect the memory of the D50.
Press Tune/function . The display will flash. Change it using the joystick ... move to left.
2. press exit
3. open the sys ex sound bank
4. press the send data tab in the Sound library program
5. on the d50 press Data Transfer
6. hold data transfer and press bulk load
120ms works best for me.
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Using the M256e card
This is a modern replacement for the old Roland soundbank cards
The light must be on when you plug in the card.
Press CARD on the D50 --- display will say "illegal card"
This is only because the card isn't formatted.
Press "DATA Transfer" & then "Int --> crd".
It will still say "illegal card"
ignore this and press "enter"
you will see the sending message and "verify error"
This is OK
press exit
Check the card. your sound bank should have been transferred