diff --git a/wgmaster/export.py b/wgmaster/export.py
index ada4475..6607146 100644
--- a/wgmaster/export.py
+++ b/wgmaster/export.py
@@ -1,27 +1,120 @@
 #!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 
+from typing import Tuple, List, Generator, Dict, Any
 import argparse
 import os
+import sys
+import string
+import datetime
+import hashlib
 import pypyodbc
 
 import csv
 
 
+IGNORED_PATHS = ['C:\\Windows']
+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}:')]
+
+
+def search_accdb(base_path: str = None) -> Generator[str, None, None]:
+    if base_path is None:
+        for drive in get_drives():
+            yield from search_accdb(f'{drive}:')
+        return
+    try:
+        for entry in os.scandir(f'{base_path}\\'):
+            path = f'{base_path}\\{entry.name}'
+            if path in IGNORED_PATHS or entry.name in IGNORED_NAMES:
+                continue
+            if entry.is_file() and entry.name.lower().endswith('.accdb'):
+                yield path
+            elif entry.is_dir() and not entry.is_symlink():
+                yield from search_accdb(path)
+    except PermissionError:
+        pass
+
+
+def get_accdb_info(filename: str) -> Tuple[str, datetime.datetime, datetime.datetime, int]:
+    stat = os.stat(filename)
+    with open(filename, 'rb', buffering=0) as f:
+        filehash = hashlib.file_digest(f, 'md5').hexdigest()
+    return filehash,\
+        datetime.datetime.fromtimestamp(stat.st_ctime),\
+        datetime.datetime.fromtimestamp(stat.st_mtime),\
+        stat.st_size
+
+
+def get_accdb_files() -> Dict[str, Dict[str, Any]]:
+    files = {}
+    for filename in search_accdb():
+        filehash, ctime, mtime, size = get_accdb_info(filename)
+        if filehash not in files:
+            files[filehash] = {'hash': filehash, 'size': size, 'locations': [], 'names': set(),
+                               'ctime': ctime, 'mtime': mtime}
+        fh = files[filehash]
+        fh['locations'].append(filename)
+        fh['names'].add(filename.split('\\')[-1].lower())
+        if mtime > fh['mtime']:
+            fh['mtime'] = mtime
+        if ctime < fh['ctime']:
+            fh['ctime'] = ctime
+    return files
+
+
+def prompt() -> str:
+    print('Searching for accdb files...', flush=True)
+    files = get_accdb_files()
+    file_map = {}
+    n = 0
+    for info in sorted([f for f in files.values()], key=lambda f: f['mtime'], reverse=True):
+        name = tuple(info['names'])[0][:-6]
+        if name != 'wgdaten':
+            continue
+        n += 1
+        file_map[n] = info
+        locs = info['locations']
+        print(f'{n:>2}: {name:<24} {locs[0]}')
+        print(f'      Created:  {info["ctime"].date().isoformat()}   {locs[1] if len(locs) > 1 else ""}')
+        print(f'      Modified: {info["mtime"].date().isoformat()}   {locs[2] if len(locs) > 2 else ""}')
+        for loc in locs[3:]:
+            print(' ' * 29 + loc)
+        print()
+    while True:
+        try:
+            text = input('Choose accdb file (default=1): ')
+            if text == '':
+                choice = 1
+            else:
+                choice = int(text)
+            if 1 <= choice <= n:
+                break
+        except ValueError:
+            pass
+    return file_map[choice]['locations'][0]
+
+
 def main() -> None:
     parser = argparse.ArgumentParser()
     parser.add_argument('-o', '--output', default='tables')
-    parser.add_argument('wgdaten', metavar='WGDATEN')
+    parser.add_argument('-f', '--file', metavar='WGDATEN', required=False)
     args = parser.parse_args()
 
     os.makedirs(args.output, exist_ok=True)
 
-    print(f'Opening {args.wgdaten}...', flush=True)
+    if not args.file:
+        args.file = prompt()
+
+    print(f'Opening {args.file}...', flush=True)
 
     pypyodbc.lowercase = False
-    cnx = pypyodbc.connect(f"Driver={{Microsoft Access Driver (*.mdb, *.accdb)}};Dbq={args.wgdaten};")
+    cnx = pypyodbc.connect(f"Driver={{Microsoft Access Driver (*.mdb, *.accdb)}};Dbq={args.file};")
     cur = cnx.cursor()
-    print(f'Opened {args.wgdaten}!', flush=True)
+    print(f'Opened {args.file}!', flush=True)
 
     try:
         print(f'Fetching tables...', flush=True)