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To achieve higher performance when copying files, Windows uses a technique knows as <Write Caching>. When Write Caching is enabled, a copied file may not be written to disk immediately, and this can cause problems when using removable storage, such as an SD card.
To prevent errors occurring when you remove the SD card from the reader after uploading your data, you should make sure that Write Caching on the SD card reader is disabled. To disable Write Caching on your PC, do the following:
1. Insert your card reader into the USB slot, and open up <My Computer>. Find your Card reader (Removable Disk) in the list of drives, right-click on it, and select <Properties> from the menu. Depending on whether you are running Windows XP or Windows 2000, the next steps are slightly different.
2. In the Properties window, select the <Hardware> tab. Locate the SD card reader (Multi Flash Reader USB Device), and click the <Properties> button at the bottom of the window.
3. In the new Properties window that opens, click on the <Policies> tab. Make sure that the drive is set to <Optimize for quick removal>.
4. That's it, you're finished.
2. In the Properties window, select the <Hardware> tab. Locate the SD card reader controller (This will be different depending on your computer, but it is usually the first item in the list). Select this item, and click the <Properties> button at the bottom of the window.
3. In the new Properties window that opens, click on the <Disk Properties> tab. Make sure that the the box marked "Write cache enabled" is unchecked.
4. That's it, you're finished.
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