Import Worksheets Into Master Workbook

There are 7 files on the network that everyone updates. These are contact databases for clients, insurance companies, our agents, etc. Any changes that need to be made are made. The first person to open a file will get edit mode, the others will only get read-only mode. I rarely have to edit, so if I'm first then I'll invariably be asked to exit so others can update them. I've tried doing the share workbook, but it's not working. That's not what I'd like to do anyway.

I've made a workbook with 7 different sheets, each tab named after one of the network databases. I'd like for these sheets to automatically update if/when changes are made to the master - but keep my formatting intact. Right now I'm relying on import external data, but that doesn't update. Therefore, I have to delete and re-import every morning, losing all of my formatting. Surely Excel has an easier way to do this?

The databases are highly sensitive information so I can't really attach one - but I will attach a dummy example of what they all look like. Each file is hundreds of rows and maybe 15-20 columns, so the thought of linking each cell is more than I'm looking to do.