IDOC of large size

Hi Experts,

I have a customer query.

They are sending IDOC ARTMAS and LAYMOD01

ARTMAS = 30 MB

LAYMOD01 = 90 MB.

This is a single IDOC document and not a batch.

They are sending from SAP to ADAPTER .

They are sending IDOC of such a large size. Is there any way to get a more better process for sending such a large data.

Also , can someone brief me about ARTMAS and LAYMOD01.

Thanks & Regards,

Akriti