Using the DiMeCard is easy. Just insert your microSD cards into the slots, and you'll hear a click to know it's locked in place. You can write down what each card is for on the writable panels. For work on the go, slip it into your purse or wallet. When you're at your desk, leave it out - it's big enough not to get lost. Be careful when inserting and removing cards to avoid damaging the spring clips. Since the lanyard and microSD cards aren't included, you'll need to get those separately. There's no special maintenance needed, just keep it clean and dry.