Do this:
Get an external HDD and format a partition on it (FAT32)
Download 'FSTOOLBOX' app for HBC and do a NAND Dump.
Move all the contents from folder SD:/FSTOOLBOX to USB:/nand
NOW you can run your GH5 with uLoader's DLC Hack (It will download the DLC to your HDD instead of your NAND)
If...