Fortunately for photographers, over the years, memory cards are getting cheaper while providing more and more available storage space. The most important characteristics of the memory card are the type, size, and speed. The most common type of memory card is the SD (which includes the SDXC and SDHC); however, some cameras use older types of memory cards such as the Compact Flash (CF-I), Multi Media Card (MMC) and xD-Picture Card.
Real Estate photography usually demands thousands of RAW files in a full day of shooting several homes; therefore, you should have at least two memory cards with a sufficient amount of storage space. Instead of one expensive memory card with 256GB of space, I would recommend having two cards with at least 128GB of space so that you can keep one spare card in your camera bag at all times. Having an additional card with you can be handy when your main memory card corrupts, or you accidentally forget to put it back into your camera after transferring photos on your computer at home.
Memory card ‘read speed’ refers to how fast the image files transfer from the card to your computer. The ‘write speed’ (also known as card speed) refers to how fast the data transfers from the camera to the memory card when shooting. Super-fast write and read speeds are essential for certain types of photography (i.e. sports and action photography) but are not overly important for real estate photographers.
You should also remember to format your memory card at the start of each day to avoid running out of space or needing to delete files one by one if you’ve already shot a few houses that day and can’t format the entire card.