shift it attachments from crm 4.0 to share-point 2015 on-premises

Hi all,

I have all attachments regrading all entities in crm 4.0.Now i plan to shift it all in share-point 2015 on-premises  version as an list library or document management something.My objective is only to shift all attachments in share-point then latter on i'll migrate crm to crm 2015 as well.But primarily i want to transfer all attachment in share-point.

Please suggest me