Thanks for your reply.
Timing issues are only happening with Stock Central, typically when trying to save barcodes, Supplier and Supplier SKU's. I have found that if i refresh the Stock Central page every couple of pages worth of updates this stops it happening.
We have pretty decent CPU, memory and storage so i dont think its got anything to do with that, we haven't seen any faults of issues with cPanel its only inside the ATUM plugin. Not a big one, we appreciate we are working with a lot of data.
The Export Pro should have worked you are correct, we had decreased the scale of what we wanted in the report to bare minimum, essentially only asking for the core components as well as barcodes and suppliers and it downloaded in super speed but the upload was left for around 40 min and it failed to progress so we canceled the import.
We will try ExportPro again once the database is completed, we have decided to just do all the barcodes, suppliers etc manually. A long and lengthy process but we know its correct.