Code:
19:25:50 - Selected ARC/DS method for Data1a-01.bin was: xtool:c128mb:mzstd,l13:zstd_152:dd3+4x4:b64mb:lzma:ultra:64m:bt4:fb273:lc8:mc1000000
19:25:50 - Selected ARC/DS method for Data1b-01.bin was: xtool:dd3:l10,d128mb
---------------------------------------------------------------------------------------
19:47:52 - Overall input size: 9,43 GB
19:47:52 - Overall output size: 6,27 GB (Processed ratio 66.47%) (Ratio 66.46%)
19:47:52 - Overall conversion time: 00:22:00
You have to specify zstd level otherwise you will get unpacking errors.