diff --git a/wgmaster/export.py b/wgmaster/export.py
index 6607146..cc733fc 100644
--- a/wgmaster/export.py
+++ b/wgmaster/export.py
@@ -4,9 +4,10 @@
 from typing import Tuple, List, Generator, Dict, Any
 import argparse
 import os
-import sys
 import string
 import datetime
+import ctypes
+import ctypes.wintypes
 import hashlib
 import pypyodbc
 
@@ -18,7 +19,11 @@ IGNORED_NAMES = ['Program Files', 'Program Files (x86)', 'AppData']
 
 
 def get_drives() -> List[str]:
-    return [d for d in string.ascii_uppercase if os.path.exists(f'{d}:')]
+    # only return local file systems
+    length = (ctypes.wintypes.DWORD * 1)()
+    mpr = ctypes.WinDLL('mpr')
+    return [d for d in string.ascii_uppercase
+            if os.path.exists(f'{d}:') and mpr.WNetGetConnectionW(f'{d}:', None, length) != 0xEA]
 
 
 def search_accdb(base_path: str = None) -> Generator[str, None, None]: