4GB memory cards store many pictures but have disadvantages.
Digital cameras use removable memory cards to store still pictures and videos. You can then remove the card from your camera and insert it into your computer, printer or card reader to upload the files to your device. You will not be able to store many high-resolution photos on a small memory card, but larger cards have their own drawbacks.
Potential for Failure
You can lose many files if your 4GB card fails. According to memory card manufacturer SanDisk, a 4GB card will hold up to 286 uncompressed and 2,861 compressed images in a 4 megapixel camera. Higher resolution cameras will use more space on a card, but the potential for losing many irreplaceable images exists if the card fails.
Slow Upload
The larger the card, the longer it will take to upload your images to your device. Some cards, such as CompactFlash cards, have internal chips that make uploading faster, but these cards can be unreliable when not cared for properly. Upload speeds also depend on the device that is receiving the upload. Older processors may take a long time to upload from a 4GB card.
Compatibility
Older cameras may not display the remaining space on the card correctly. This does not affect the quantity or quality of the images, but you may not be able to know exactly how many images you are able to take. The camera will show the highest number of remaining images the camera thinks it can take until the number of images remaining reaches that number. The camera will then calculate remaining images correctly.
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