Shell creation issue

Dear experts, I've got a question regarding shell creation of TDMS.

I've finished the export from ECC IDES system (SR3). The size of export files are over 30GB... is it normal? Can I reduce the data? Since it'll take me more than 200GB disk in target system.

Is it been setup in the step of "Determine Tables to be Excluded from the Export"?

Which data can be reduced in the table regarding IDES shell creation?

Thanks!