NF DP420LS Instruction Manual page 95

4. Advanced Operation
 Load the sequence stored in the USB memory
For how to connect USB memory to this product, and how to disconnect from this product, see 4.9.
1. In Sequence Edit View, select [File] soft-key  [2: Recall]. Sequence Recall View is opened.
2. In the [From] item, select [2: USB].
76 PROGRAMMABLE AC POWER SOURCE