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Home/Fix/Fix Error 0x80070037 — Network Resource Unavailable

How to Fix Fix Error 0x80070037 — Network Resource Unavailable on Windows

Getting error 0x80070037 when accessing network shares or copying files? "The specified network resource or device is no longer available"? Fix this network file transfer error.

Symptoms

You might be experiencing this problem if you notice:

  • •File copy to network share fails with 0x80070037
  • •Large file transfers abort partway through
  • •Mapped drive becomes inaccessible during file operations
  • •Network share disconnects during sustained data transfer
  • •Backup software fails with network resource error
  • •Remote desktop file transfer interrupted with this code

Common Causes

  • ⚠Network timeout during large file transfers
  • ⚠SMB session dropped due to idle timeout settings
  • ⚠Unstable network connection (WiFi or bad cable)
  • ⚠Network adapter power management disconnecting during transfers
  • ⚠SMB signing or encryption causing timeouts on slow links
  • ⚠Firewall or security software terminating long connections

Solutions

Solution 1: Fix Network Timeout Settings

  1. 1Increase SMB session timeout:
  2. 2PowerShell as Admin:
  3. 3Set-SmbClientConfiguration -SessionTimeout 300 -Force
  4. 4Set-SmbClientConfiguration -KeepConn 600 -Force
  5. 5Also increase on the server/NAS if you have access
  6. 6Set-SmbServerConfiguration -AutoDisconnectTimeout -1 -Force
  7. 7The -1 value disables auto-disconnect entirely
  8. 8Restart the "Workstation" and "Server" services
  9. 9Retry file transfer

Solution 2: Fix Network Adapter Stability

  1. 1Disable power management for network adapter:
  2. 2Device Manager → Network adapters → your adapter → Properties
  3. 3Power Management tab → UNCHECK "Allow the computer to turn off this device"
  4. 4Advanced tab → look for "Energy Efficient Ethernet" → Disabled
  5. 5If on WiFi: use Ethernet for large transfers (more reliable)
  6. 6Check cable: replace if transferring over 1m file sizes and getting drops
  7. 7Test connection: ping the server continuously while transferring
  8. 8CMD: ping server_ip -t (watch for "Request timed out")

Solution 3: Adjust SMB Protocol Settings

  1. 1If transfers fail on slow or high-latency connections:
  2. 2PowerShell as Admin:
  3. 3Set-SmbClientConfiguration -EnableBandwidthThrottling $false -Force
  4. 4Set-SmbClientConfiguration -EnableLargeMtu $true -Force
  5. 5If using VPN: SMB signing can cause timeout issues:
  6. 6Set-SmbClientConfiguration -RequireSecuritySignature $false -Force
  7. 7(Only do this on trusted networks)
  8. 8For NAS devices: check NAS firmware is up to date
  9. 9Some NAS have SMB3 bugs causing dropped connections
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