1. The UFD could be conflicting with a pre-assigned drive letter. To resolve, do the following (Do not do this for a ""Privacy"" drive that assigns two drive letters):

  1) Insert the UFD and open "Control Panel". Then open "Administrative Tools".

  2) Open Computer Management

  3) Select “Disk Management” on the left window pane.

  4) Locate the UFD on the right window pane.

  5) Right-click on the drive and select “Change Drive Letter and Paths.”

  6) Click Change and select a new drive letter from the drop-down box. Then click OK.

2. The UFD may be conflicting with pre-installed software. Disable all applications running in the background prior to installation of the Data Traveler.

  1) Make sure Windows, any USB controller drivers and the system BIOS for you computer is up to date.

  2) If you have a desktop computer, make sure the UFD is inserted directly into one of the main USB ports on the back of the PC. Front ports, keyboard ports or USB Hubs may not supply sufficient power for the High Speed UFD to function properly.

  3) Check for a possible conflict is another USB device such as a printer or USB card reader. Unplug the other USB device, insert the UFD drive and restart the system. After the UFD is configured you should then be able to connect the other USB device."

Windows may not recognize the MacOS Extended or Standard file system. To resolve, format the drive in MacOS DOS so that it can be used in both environments.

WARNING: Formatting will erase all of the data on the UFD. Back up your data before proceeding.

Insert the UFD into the Mac OS X machine and wait for it to mount.
Click on the ""GO"" option on the menu bar.
Double-click on Utilities (If you do not see Utilities, double-click on Applications and then double-click on the Utilities folder.)
Double-click on the Disk Utility icon.
On the Disk Utility Dialog box, click once on the UFD active partition. Note: There will be two listings for the UFD, the first one is the active partition and the second is the volume label.
Click the erase tab located on the right side of the screen.
Using the Volume Format drop-down, select ""MS-DOS File System"" from the list.
Click Erase.
Be aware MacOS 10.6.5 will support full read and write access to exFAT formatted drives. So formatting the drive using exFAT file system may also resolve this problem. MacOS still has read only access to NTFS formatted drives.

Some devices (MP3 players, digital photo frames, etc) will not read NTFS or exFAT file systems.

Also Windows XP and Vista will require an update in order to access exFAT.

Follow the steps below to format the UFD with an NTFS File system using Windows PC.
Remove all other external flash devices from your computer.

Right-click My Computer (Computer in Vista) and select Manage.
Note: If User Account Control is enabled in Windows Vista, an alert will display. Click Continue to proceed.
From the right side window, double-click Storage and then double-click Disk Management.
From the right side window, right-click the drive and select Format.
Note: You may receive a warning: "This is the active partition on this disk. All data on the partition will be lost. Are you sure you want to format this partition?" Click Yes to proceed.
In the Format window, select ""NTFS"" file system and a check the box next to ""Perform a quick format."" Click OK.
Click OK on the Format warning window.
The  drive window will display ""Formatting"" while the drive is being formatted. Once the format is complete, the status will revert to "Healthy."

You may have formatted the drive with an exFAT file system while using Windows 7. In order to resolve, reformat the drive with the FAT32 or NTFS file system. You may also be able to update your operating system to be compatible with exFAT. But be aware some devices (MP3 players, digital photo frames, etc) will not read exFAT file system.