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These external hot pluggable cards are for PC's which feature the Express Card slot. Usually on laptops and available in two form factors, ExpressCard 34 & ExpressCard 54 which are sized 34 and 54mm respectively. Note that a 34mm slot will only accept a ExpressCard 34, with a 54mm slot able to accept both types.
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A network card is designed to connect a laptop, PC, workstation or server to a network, enabling communication with other internal users via network switches or access points; and the outside world via a router.

These external devices are designed for an external USB port of a system, feature RJ45 ports and will provide wired connectivity based on Ethernet at speeds up to 1Gb/s.

These adaptors enable you to install SSDs in different ways, for example enabling you mount M.2 drives in a PCIe slot.

Build your own miniature PC or embedded device using SBC (Single Board Computers) from the Raspberry Pi ecosystem of ARM-based processors.