i done retesting xtool on large files dat far cry 5...
using xtool on multiple files at once like
[Dunia2]
File1=GAME\data_final\pc\worlds\farcry5.dat
File2=GAME\data_final\pc\patch.dat
seem to skip files (just copy)
using xtool on one file at time like
[Dunia2]
File1=GAME\data_final\pc\worlds\farcry5.dat
seem to work...

using xtool 0.9 with setting
packcmd = xtool.exe e

recomp:t4,v,c32m:lz4 - - <stdin> <stdout>