Dumps high 3 octets of 3DS MAC and lfcs/deviceID with LSB replaced with 0x80 as an average. The dumpfile location is sdmc:/lfcsdata_XXXXXXXX.bin with the XXXXXXXX being random hex. You need latest Luma3DS (10.2.1+) to run this successfully since it needs ps:ps, a highly privileged service.
This collected data from volunteers will be used to improve bruteforcing the lfcs much how msed_data was used to improve bruteforcing of the full movable.sed.