We currently have 10 computers consisting of a combination of Dell latitude 5200's, 7200's and 6400's. Also vary between 32-bit, 64-bit, and win7/10. We have an external HDD connected directly to the router through the USB port. We need all ten computers to connect via network and accessed via Network place (Samba). About three or four computers can access it without issue but others randomly cannot and get the error message in the attachment and an insufficient system resources error as well. A few minutes go by with no luck, tried removing people from the network, homegroup etc.; Hoping to remove some of the strain on the router believed to be the cause of the error (per Asus). Eventually they are able to access it again when nothing has changed. If anyone has any ideas they would be greatly appreciated. Have also tried disabling firewall and antivirus software.