Oregon Series Owner’s Manual Appendixplug-in from www.garmin.com/products/communicator.Loading and DeletingFilesNoticeWhen deleting files, do not deletepre-programmed map data (filesthat end with “.img”). It is notrecoverable.You can use the Oregon as a USBmass storage device, and you canpurchase a separate microSD cardfor additional external memory.NOTE: The Oregon is notcompatible with Windows® 95, 98,Me, or NT. It is also not compatiblewith Mac® OS 10.3 or earlier.To load a file onto the Oregon ormicroSD card:1. Remove the battery cover andinsert a microSD card (page 37).2. Connect the USB cable to theOregon and your computer.3. Copy the file from your computer.4. Paste the file into the Garmin orthe microSD card/volume.To delete a file from the Oregonor microSD card:1. Open the Garmin or SD carddrive/volume.2. Highlight the file and press theDelete key on your computerkeyboard.Optimizing Battery LifeUse premium batteries for optimalperformance and maximumbattery life. The best performanceis provided by lithium batteries,precharged (ready-to-use) NiMHbatteries, and NiMH rechargeablebatteries less than one year old witha capacity greater than 2500 mAh.