I have some experience with Elmod Blaster III only, but I think it is similair


1. First of all You need Micro SD card reader ( USB version?)
2. Remove SD card from Blaster , place it into the reader, and connect the reader to PC. The content of the SD card should appear as aaditional drive in Your system (Windows?). Now You can copy and delete all files stored on SD card
3. Backup all original files stored on SD card onto Your hard drive.
Blaster gives opportunity to use up to eight different sound tank projects. Each sound project is stored in folder named 111, 110, 101 etc. Name of the folder refers to jumpers J1, J2, J3 position on Your Blaster module /Jumper J4 is not used in sound selection/
For example

J1 J2 J3
1 1 1 Tiger1
1 1 0 Tiger 2
1 0 1 Tiger 1
1 0 0 Panzer IV
0 1 1 Panzer III
0 1 0 T34
0 0 1 Panther
0 0 0 Abrams

1- jumper closed
0- jumper open

Each sound project stored in folders 111, 110 etc consist of several "wav" sound files (8 bit 22 kHz). The configuration of sound files is stored in text file named "blaster.ini" . See attached file for details