Start by confirming your Canon camera supports SD cards up to 2GB (SDSC). Then select a card with a suitable speed class (Class 4 or higher for decent performance) from trusted brands such as Canon, SanDisk, or Kingston. Consider durability and warranty, but remember that a 2GB card is limited in capacity, so plan your shooting accordingly.

The most complex attribute is the card's speed class and sustained write performance, because it affects how quickly data is recorded during shooting. Higher class ratings reduce delays during continuous shooting or basic video capture. In practice, a faster class helps avoid dropped frames and keeps your camera responsive, even with a 2GB capacity.

For casual shooting and light use, a 2GB card can cover a few sessions or short trips. For frequent shooting, RAW files, or longer video clips, upgrading to larger capacity cards is advisable to avoid constant swapping. In any case, choose a reliable brand to ensure data integrity.

Format the card in-camera to ensure compatibility with your device's file system (2GB SDSC typically uses FAT16). Keep the card clean and free of dust, store it in a protective case, and avoid exposing it to extreme heat or moisture. When mounting, handle the contacts gently and ensure the write-protect switch (if present) is not engaged.

Choose from well-known brands like Canon, SanDisk, and Kingston, including their reliable series designed for everyday use. Avoid unknown suppliers, and look for warranty support to protect your purchase.

Start with basic checks: remove and reinsert the card, try it in another device, and test with a different card to rule out a camera issue. If the card is recognized, format it in the camera for proper compatibility. If problems persist, check the card for physical damage or try another brand/series.