If you have lost your USB cable you can get a replacement. Within Garmin Express, selecting 'Install All' under the 'Updates' tab is the safest option.If all goes to plan, not only will the latest maps for your sat-nav be installed but also the latest device software, Bluetooth updates, voice updates and so on. Register your sat-nav by entering your email address when requested to do so. I recommend that you only use Express if you have a good and reliable broadband connection as some of the maps files are very large and take several hours to download from Garmin. During the update procedure and depending on your device, you may be asked to disconnent your sat-nav from your PC and reboot it (turning it back on).At the end of the process your sat-nav will be right up to date. This step is the installation of the latest software (not the maps) for your device.It is important to let this procedure complete - don't be tempted to switch on/off your device even if it looks like nothing is happening.You buy a micro/SD card preloaded with the Ireland/UK maps, you insert it into the side of your device and off you go.This process is painless, straightforward and the cheapest solution.
For example, the one I listed above in the Baidu Cloud works great.Maybe put back in my car as a backup when cell phone signals are low. Garmin had some firmware updates (Version 5.20) dated back in 2010. After install the software and plug in the GPS in the computer, the software automatically detected the device and offer me the updates. Garmin offers one time update for or lifetime update for . For example: North America 2015.10 and North America 2013.40 .The only problem with this old buddy is that the map is dated back in 2009 (I know, it was a long time ago). My previous firmware version is 3.4, so it is good to update. The newer maps are great except one problem: they are too big.For those with newer devices these changes have made it much simpler, for others it can still be a painful process with numerous calls to Garmin technical support.Even with several years of updating various models of Garmin sat-navs, I have found the experience torturous at times.After this, you can disconnect the GPS and it would reboot with the updated map file in the SD card.