Roland SP-404MK2 Reference Manual page 56

Editing a Sample (SAMPLE EDIT)
If you want to keep your data or make sure it doesn't get accidentally modified, we recommend that you follow the steps
in "Backing up Your Data
Deleting all samples in a bank at once
1. Hold down the [DEL] button and press the [EXIT] button.
The bank deletion screen appears.
2. Press the bank [A/F]–[E/J] buttons.
Select a bank to delete.
3. Press the [VALUE] knob or [DEL] button.
The samples in the selected bank are deleted.
You can't restore a pad's sample after it has been deleted.
If you want to keep your data or make sure it doesn't get accidentally modified, we recommend that you follow the steps
in "Backing up Your Data
56
(BACKUP)(P.105)" to create regular backups.
(BACKUP)(P.105)" to create regular backups.