Connect Drive in Windows Explorer

Windows has WebDAV built in, so you can map TrekMail Drive as a network drive without installing anything. Once mapped, it appears under This PC with its own drive letter — drag files in, open them from any app, save, and changes upload automatically.

Before you start

You need a device password. Sync apps get their own one-time password, separate from your dashboard login — that way you can revoke sync access without changing your main password.

1. Open Sync devices in your TrekMail dashboard.
2. Click + Add new device.
3. Name it (e.g. Work PC — Explorer).
4. Leave View files and Edit files checked.
5. Click Generate password and copy the password (starts with dsync_).

Map the network drive

1. Open File Explorer (press Win + E).
2. In the left sidebar, right-click This PC and pick Map network drive….
3. Pick a drive letter (any free one — D:, T:, Z: are common).
4. In the Folder field, paste the Drive server URL shown at the top of the Sync devices page. It looks like https://drive.YOUR-DOMAIN/dav/files/account/ — copy it directly from the banner so the host part matches your account.
5. Check Reconnect at sign-in so the drive comes back after restarts.
6. Check Connect using different credentials.
7. Click Finish. Windows asks for credentials.
8. Enter:
   • User name: your TrekMail account email
   • Password: the device password (dsync_...)
9. Check Remember my credentials, then click OK.

Your Drive opens in a new window. It now lives under This PC with the drive letter you picked.

Working with files

• Drag files into the drive window — they upload as you drop them.
• Open documents from Office apps — saving sends the file back to the server.
• Right-click → New → Folder works like any folder.
• Delete moves to Drive's trash. Restore from the dashboard within 30 days.

Large files upload in chunks automatically — there is no size cap on the TrekMail side. The only ceiling is whatever Windows imposes on its own WebDAV client (see below).

Enable large-file uploads (one-time Windows tweak)

By default, Windows itself refuses WebDAV uploads larger than 50 MB at the OS level — this is a Microsoft default, unrelated to TrekMail. To lift it:

1. Press Win + R, type regedit, press Enter.
2. Navigate to:

   HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WebClient\Parameters
   

3. Double-click FileSizeLimitInBytes.
4. Pick Decimal and enter 4294967295 (~4 GB — the maximum Windows allows).
5. Click OK, then restart your PC (or restart the WebClient service from Services).

For files larger than 4 GB (Windows' own hard cap; TrekMail has none), use rclone — it bypasses Windows' WebClient entirely and uploads any size.

Troubleshooting

• "The network folder specified is currently mapped" — Windows already has a connection. Open Command Prompt and run net use * /delete /y, then re-map.
• "The folder name is not valid" — the URL must start with https:// and end with /dav/files/account/. Check for missing slashes.
• "The mapped drive could not be created" — Windows WebClient service is stopped. Open Services, find WebClient, set it to Automatic and start it.
• Slow on large files — Windows WebDAV transfers chunk-by-chunk in serial. Use rclone for big uploads.
• Login keeps prompting — Windows sometimes drops cached credentials. Remap and re-check Remember my credentials.

For broader sync issues, see Drive Sync troubleshooting.