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The Expandability Options of GPS Navigations

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1. Media Player

Some users like the idea that their GPS navigation units could also store their media files. Though audio and video playback features tend to be poor on most units, it may be nice to be able to use your navigation unit as a slideshow display or music player. However, since you are after all looking for a navigation unit, do not take this feature to be the determining factor in deciding which to get. Besides, most GPS units have this feature anyway. Just remember that you're looking for GPS navigation, not an Mp3 Player.

2. Hard Disk

Menu data, how-to tutorials, and map files all need to be stored in your unit. Most navigation devices have built in hard disks to store all these files. It's not small either. 15GB-30GB of hard disk capacity is becoming standard and should be included with virtually every unit. However, some run almost entirely off of SD memory Cards, CDs, or DVDs. The advantage of having the hard disk is its reliability and speedy access. In addition, built-in hard disks usually give you a little bit of room to expand-either for your media files or potential space for additional map updates in the future.

3. Flash Card

Most portable GPS units will feature SD card slots. Some also feature other flash cards, including Memory Stick/Pro or MMC. These will slots will be used as either a way for you to transfer media files such as MP3, MPEG, and JPEG files into the unit or it could also serve as a way for you to upgrade the firmware or map data on your unit.

4. USB

Connection to your PC is accommodated through the availability of the USB port that may or may not be built-in on your GPS Navigations. USB ports allow for easier updates and upgrades the manufacturer may have for your unit and will allow you to transfer files with much more efficiency than flash cards.

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