Memory Cards
Memory Cards — microSD and SD
236 cards from SanDisk, Kingston, Silicon Power, Patriot, Adata, GoodRam and PNY. The cheapest way to quadruple the storage of a phone, an action camera or a console.
- SanDisk 84 · Kingston 41 · Silicon Power 24 · Patriot 22 · Adata, GoodRam, PNY
- microSD for phones, tablets, action cameras and consoles · SD for cameras
- Speed classes for 4K video and apps
- From official distributors — not unknown sources
Speed classes, without the confusion
Three symbols on the packaging actually matter. U1 or U3 states the minimum write speed: U1 guarantees 10 MB/s and U3 guarantees 30 MB/s, which is the minimum for 4K video.
V30, V60 or V90 is the newer video scale, where the number is also MB/s. For an action camera or a phone shooting 4K, ask for at least V30.
A1 or A2 concerns Android only: it states random access speed, meaning how well apps installed on the card actually run. If you plan to move apps across, choose A2.
How much space you really need
A practical rule: one hour of 4K video takes roughly 15 GB, while a thousand phone photos come to about 4 GB. So 128 GB comfortably covers an average user, 256 GB suits anyone shooting video, and 512 GB and above is for action cameras and professional use.
Note that very large cards are not supported by every device. Older cameras and consoles have limits, so check the manual before buying the biggest one.
microSD or SD?
microSD is the small card used by phones, tablets, action cameras, drones and handheld consoles. SD is the large one, used by cameras and many laptops. Many microSD cards ship with an SD adapter, so they work in both slots.
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Frequently asked questions about memory cards
- Which card for 4K video?
- At least U3 or V30. Lower-class cards can stop the recording halfway through a take.
- What does A2 mean?
- It concerns random access speed and only matters on Android, when you install apps onto the card. For simply storing photos and video it is unnecessary.
- Does my phone accept a memory card?
- Many Samsung, Xiaomi, Motorola and Lenovo models do; iPhone and several current Android flagships do not. Check the device specifications.
- Why not buy the cheapest card?
- The market is full of cards from unknown sources that claim more capacity than they hold and lose data. We source from official distributors — a card holds photographs that cannot be taken again.
- What warranty do they carry?
- It varies by manufacturer and range, from two years to very long terms. The exact period is stated on each product page.
Choose the speed class first and the capacity second — a large slow card will disappoint you on the first video. And check whether your device has a slot in the mobile phones section.
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