We have a Konica Minolta bizhub C300 on the network and everything works fine, it just scans to a network folder very slow. The problem just started happening as in the past it was always very quick. If I would go to the C300 put my 4-5 sheets of paper in the copier go to scans and scan the document to the folder on our server and then walk back to my desk and go to the network folder and open it it would open just fine. Now it always tells me it is open by another user. After some investigating I found that it was still in the process of sending the scan to the server and once it was done sending the scan I could open it up just fine. It use to take about 10-15 seconds to send a scan to the network folder and now it is taking about 30 seconds per page.....extremely slow! Everything else on the network runs fine and is not slow and the printing is not slow. I have replaced the switch, cable going from the copier to the new switch and nothing seems to help. The network folder that we scan to is on our server, which is Windows 2008 R2 Standard with a ton of RAM. RAM usage is only at 18% so that is not the issue. It has worked fine for the past year or so and just started taking forever as of the past week. The only thing that has changed is the c: drive on the server was getting low so I repartitioned that and now have plenty of space on my c: drive. The scan folder that everyone scans to was not on the c: drive on the server it was on the d: drive which has over 1.5Tb of available space.
Try changing the scan folder to a location on a different server or pc. This will help rule out the server.