Skip to content
Storage Technology • Comparison

SD Express vs MicroSD:
Which Card Do You Need?

SD Express delivers 1,700 MB/s. MicroSD tops out around 180 MB/s. But they're not interchangeable — here's why the difference matters.

💾

Technical Team

EasyDriveCompare.com

The Short Answer

SD Express and microSD cards are physically incompatible — they use different sizes and interfaces. SD Express is the full-size (32×24mm) professional standard built on PCI Express. MicroSD is the fingernail-sized format used in phones, gaming consoles, and cameras.

The confusion arises because there's also microSD Express — a newer standard that brings SD Express speeds to the tiny microSD form factor, relevant for Nintendo Switch 2 owners.

What Is SD Express?

SD Express is the newest generation of full-size SD card technology. It uses a PCI Express interface instead of the older SD bus protocol, delivering dramatically faster speeds — up to 1,700 MB/s read and 1,200 MB/s write.

Physical size: Standard SD format (32mm × 24mm). Not the tiny microSD size. Cannot be used in a phone or Nintendo Switch slot.

SD Express cards are designed for professional workflows: 4K/8K video recording, high-speed burst photography, and enterprise storage applications where maximum throughput matters.

What Is MicroSD?

MicroSD cards are the tiny memory cards found in mobile phones, Nintendo Switch consoles, action cameras, and compact devices. They use the traditional SD card protocol and come in microSD, microSDHC, and microSDXC variants depending on capacity.

Performance: Modern high-performance microSD cards reach 100–180 MB/s read and 60–90 MB/s write — fast enough for most consumer use cases, including gaming consoles and 4K action cameras.

Speed & Spec Comparison

FeatureSD ExpressMicroSDMicroSD Express
Read SpeedUp to 1,700 MB/s100–180 MB/s100–265 MB/s
Write SpeedUp to 1,200 MB/s60–90 MB/s60–200 MB/s
InterfacePCI Express 4.0SD BusPCIe (miniaturised)
Physical Size32 × 24mm (full SD)11 × 15mm11 × 15mm
Works in Switch 2?NoYesYes
Works in smartphone?NoYesYes
Typical UseProfessional cameras, workstationsPhones, Switch, GoProSwitch 2, emerging devices
CostPremiumAffordableMid-range

Which Should You Buy?

Choose SD Express if you:

  • • Work with 4K or 8K video professionally
  • • Shoot high-speed burst photography with a compatible camera
  • • Need maximum speed for enterprise workflows
  • • Already have compatible equipment (professional cameras, workstations)

Choose MicroSD if you:

  • • Use an Android phone or Apple device
  • • Play games on Nintendo Switch (original or 2)
  • • Use a GoPro, drone, or action camera
  • • Need affordable, pocket-sized portable storage

Choose MicroSD Express if you:

  • • Own a Nintendo Switch 2 and want the fastest possible load times
  • • Want a future-proof card as more devices adopt the standard
  • • Don't need the extreme speeds of full SD Express

Compare MicroSD & MicroSD Express Prices

Find the best deals on microSD and microSD Express cards from trusted UK retailers — sorted by price-per-GB value.

See microSD Deals →