Attain 3.60

HI! we have Navision Attain 3.60 running. Before we had navision 2.60 running. Our Navision own database 32GB is placed on 16 disks. Each disk is 9 GB and there is 2 GB reserved for one *.fdb file. Database1.fdb, database2.fdb … 16 + 2GB = 32GB Now we will get a new server. We want later also expand our database to 64GB. Should we again take 16 drives and on every drive 4 GB fdb files. Or should we make one large fdb file on a 72 GB disk? What is the right decision? Thanks!