You will want to format your 64k storage module to take only items of which you'll have a lot (meaning more than 5000 or so). Otherwise it's just a waste of resources because you won't be able to store more than 63 item types in it. I usually have only one or two 64k modules (for bulk-quanitity metals and things like coal) but several to many 1k modules to store all the stuff I only have 1 or 2 of - or up to about 250.
Note for non-automated crafting: You need 36 basic and 4 advanced processors for a 64k module. I don't bother to automate the assembly table, crafting on demand just takes too long with it. Instead, I produce a stack or two of processors now and then, as often as I can spare the resources and foresee some need.