Internal card reader $($USB $2\mathrm{.}0)$

External card reader $($USB $2\mathrm{.}0)$

External card reader $($USB $3\mathrm{.}0)$

Internal card reader $($USB $3\mathrm{.}0)$

Memory card adapters

Can support card$-$to$-$card transfer

Works with many different kinds of cards

Won't get lost easily

Might come free with the memory card

Only works with certain desktop cases

Might use up the motherboard's one USB $3\mathrm{.}0$ connector