Registering your GPS Maps [MAC] How to register your GPS maps MicroSD Technical guide – Backroad Map Books 1. Why Register Your MicroSD? Feature Description Computer‑based map downloads Access to the latest Computer Maps for macOS & Windows. Secure license storage Keeps your gmapsupp.unl and gmapsupp.gma files safe in your account. Discounted updates Receive future map releases at a reduced price. Priority technical support Faster response for any Garmin‑map‑related issue. Free Updates – After registration you can download map updates for 60 days at no charge. If you bought an older version from a retailer, you may upgrade to the latest map release within that 60‑day window. Important: • A card that has already been registered cannot be registered again. • If your card is “used” or already updated, the registration will fail. 2. Prerequisites Step Action Notes 1 Insert the MicroSD card • If your computer has an SD‑card slot, insert the card directly. • If not, plug the card into your Garmin GPS and connect the GPS to your computer via USB. 2 Log in to Backroad Map Books URL: https://backroadmapbooks.com/account/login Create an account if you do not already have one. 3 Locate the license files The required files ( gmapsupp.unl and gmapsupp.gma ) are in the Garmin folder on your MicroSD. 3. Registration Workflow All steps are performed on the My GPS Maps registration page. 3.1 Navigate to the Registration Page After login, click the “MY GPS MAPS” button (top‑right). On the resulting page, select “Register SD” . 3.2 Upload the Unlock Code & GMA File Field File How to select Unlock Code ( gmapsupp.unl ) gmapsupp.unl Use the Choose File button to pick this file from the Garmin folder. Gma File ( gmapsupp.gma ) gmapsupp.gma Use the Choose File button for the second field. Tip: Double‑check that the files you pick are exactly the .unl and .gma files from the Garmin folder. Any mismatch will trigger an error. 3.3 Submit Once both files appear in the form, click SUBMIT . A green confirmation box will appear, and your product will be listed under “My Products”. Result: The MicroSD card is now registered to your Backroad Map Books account. 4. Post‑Registration Access the “Computer Maps” – Log in, go to “My Products” and download the latest PC‑compatible maps. Update within 60 days – Download updates for free. Backup your files – Although the unlock codes are stored in the cloud, keep local copies of the .unl and .gma files on your computer for future reference. 4. Common Error Messages & Fixes Error Cause Remedy “No ESN data found with unlockCode” ESN (Electronic Serial Number) missing or corrupted. Contact Backroad Map Books support (email: gpsbackroadmapbooks.com). “Invalid File Uploaded” Wrong file type chosen (e.g., a .zip instead of .gma or .unl ). Re‑select the exact .gma and .unl files from the Garmin folder. “This card has already been registered” Card was previously registered on another account or already updated. Not recoverable – you must purchase a new card or contact support for advice. 5. Quick Reference Action Shortcut Log in Ctrl+L (Chrome) Open registration MY GPS MAPS → Register SD File picker gmapsupp.unl → Choose File ; gmapsupp.gma → Choose File Submit SUBMIT button Prepared by the Backroad Map Books Technical Support Team Registering your GPS Maps Digital 1. Overview This guide explains how to register your digital map access code so you can: Download computer‑compatible maps for macOS or Windows. Store a secure copy of your Garmin license/unlock files. Receive future updates at a discounted price. Access priority technical support. NOTE: After registration, you receive free map updates for 60 days . Older versions purchased from a retailer can be upgraded to the latest maps within that 60‑day window. 2. Registration Benefits Benefit Description Computer‑based map downloads Get the latest map files for macOS and Windows. Secure license storage Your Garmin license/unlock files are safely stored in the cloud. Discounted future updates Pay less for subsequent map releases. Free Updates: You can download map updates free of charge for 60 days after the first registration of the MicroSD card. 3. Update & Upgrade Policy Item Policy First‑time registration 60‑day free update period begins on the day you click Submit . Subsequent upgrades If you purchased a previous map edition from a retailer, you may upgrade to the newest edition within 60 days of the first registration. After 60 days Updates become paid and must be purchased through the Backroad Map Books website. 4. Important Warnings ⚠️ Unit ID & Access Code The 10‑digit UnitID is required for digital‑map registration. It can be found under Settings → About on your GPS device. 3. Prerequisites Item Requirement How to Obtain MicroSD Card (Optional) If you choose to use a microSD card (not the physical memory).  Insert into a GPS or computer with an SD reader. ACCESS CODE A unique alphanumeric code printed on the MicroSD packaging. Look for the “ACCESS CODE” sticker on the card’s label. UnitID A 10‑digit number that identifies your Garmin GPS. Open the GPS → Settings → About (or Device Info ) to view the UnitID. Internet Connection Required to submit the registration form and download computer maps. Any reliable broadband or Wi‑Fi connection. 4. Step‑by‑Step Registration The following steps assume you have already plugged in your GPS so it is available and ready. 4.1 Log In to the Backroad Map Books Portal Open a web browser and navigate to https://backrockodmapbooks.com Click Sign In (top‑right) and enter your account credentials. 4.2 Navigate to the Digital Map Registration Page Once logged in, click My Account → Digital Maps → Register Your Digital Map .    ![Navigate to Digital Maps](https://brmb.support/uploads/images/gallery/2025-03/scaled-1680-/reg.png) 4.3 Enter the Registration Data Field Input Example Access Code The code printed on the MicroSD card label. BCBC-7r3325caa-8cec-483d-97db-059d88f78f29 UnitID 10‑digit GPS unit identifier. 1234567890 The UnitID can be found under Settings → About on your GPS. Access Code: BCBC-7r3325caa-8cec-483d-97db-059d88f78f29 UnitID: 1234567890 4.4 Submit the Form Review the values you entered. Click SUBMIT . If registration succeeds, a green success message will appear and the new product will be listed under your account. 5. After Registration Your digital maps are now registered and available for download. The new product appears in the My Gps Maps section of your account. You can immediately start downloading the computer‑ready map files. 6. Post‑Registration Tasks Download the computer‑map files : From your account, click Download next to the registered product. Choose macOS or Windows as required. Follow the on‑screen prompts to install. Backup your license files : You can also download a copy of your Garmin license/unlock files from the portal for local backup. Schedule future updates : Within the 60‑day free window, simply click Get Updates in the portal. 7. Troubleshooting Symptom Likely Cause Fix Registration fails with “Invalid Access Code” Wrong Access Code or UnitID entered Re‑check the GPS UnitID. Registration fails with “UnitID already registered” The same UnitID was registered previously Contact support; you may have a duplicate product or need to unlink the old registration. Unable to download updates after 60 days The free update window has expired Purchase the latest map edition through the portal. Green success box never appears Browser security block (e.g., pop‑up blocker) Disable pop‑up blockers or try a different browser. 8. FAQ Q1. Can I use the Digital maps on multiple GPS devices? A1. No – the registration is tied to your GPS UnitID,  You can only load the maps on the registered GPS. Q2. Do I need to install the Digital maps to a  MicroSD card ? A2. No, the Digital maps allow you to install the maps on the internal memory or your own microSD card. 9. Contact & Support Channel Availability Notes Email Mon‑Fri 9:00‑17:00 PST gpsbackroadmapbooks.com Phone Mon‑Fri 9:00‑17:00 PST (877)-520-5670  For urgent issues, reference the UnitID and Access Code in your support request.