Files named "Signal" in this format are often associated with:
High-definition recordings split for easier transfer or storage on FAT32 drives. Amateur Radio RST-Codes - SARCNET SignalComplete.7z.004
Part .004 specifically holds a middle slice of the data stream. If this part is missing or corrupted, the entire restoration of "SignalComplete" will fail. Action Steps for Extraction Files named "Signal" in this format are often