Best 64GB MicroSD Cards in 2026: 10 Ranked, and When 128GB Wins

If you want one answer without weighing trade-offs, this is it. The Extreme is the only card in this ranking that carries every rating that matters at once: A2 for app performance, V30 for sustained video, U3 for speed class, and it publishes both speeds rather than just the flattering one — 170MB/s read and 80MB/s write.

Write speed is the specification that separates a camera card from a phone card, and it is the one most listings leave out. Of the ten cards here, six state a write figure; this has the second highest of them. That is what determines whether an action camera or drone keeps recording 4K cleanly instead of stalling.

The A2 rating is the other reason it leads. A1 covers basic app loading; A2 demands much higher random read and write performance, which is what you notice when apps installed on the card open and update. SanDisk's QuickFlow Technology handles the fast offload, though note the listing's caveat that top speeds need SanDisk's own PRO-READER, sold separately. At £20.99 it is £0.328 per gigabyte — and worth knowing that the 128GB version of this exact card is £27.99, so £7 more doubles your storage if your device takes it.

With 176,535 ratings this is the most reviewed product in the whole ranking, and that matters more than any single specification. A card with that much feedback behind it has no hidden failure mode left to discover.

It is built for phones and tablets and the specification is honest about that. The A1 rating optimises it for app loading and everyday Android use, and transfer speeds are quoted at up to 140MB/s in the title and 150MB/s in the description — a small inconsistency in SanDisk's own listing, so treat 140MB/s as the safe figure. What it does not carry is U3 or V30, and no write speed is published, so this is not the card for sustained 4K.

The Memory Zone app is genuinely useful in an Android phone: browse files, run automatic backups and shift content off internal storage to free up space, all without a computer. At £18.99 it is the cheapest SanDisk here. Do the capacity check though — the 128GB version of this same card is £22.99, which is £4 more for twice the storage and the single clearest example of why 64GB often does not add up.

This is the card that makes the ranking interesting. At £16.49 it undercuts both SanDisks, yet its 90MB/s write speed is the highest published figure on this entire list — ahead of the Extreme's 80MB/s, and more than double the 35MB/s of the Gigastone cards that cost twice as much.

For anyone buying a card for a camera, drone or action cam, that is the number that counts. Write speed governs whether footage records cleanly; read speed only affects how quickly you copy it off afterwards. PNY pairs it with V30 and U3 video speed classes, so the sustained-write guarantee is there in writing, plus A1 for app performance and an SD adapter in the box.

Where it gives ground is read speed and brand familiarity. At 100MB/s read it is well behind the Extreme's 170MB/s, so offloading a full card takes noticeably longer, and A1 rather than A2 means slightly weaker app performance if you run software from it. PNY is also less of a household name in the UK than SanDisk or Samsung, though 3,976 ratings at 4.6 is a reasonable track record. For value per specification, nothing else here comes close.

A dash cam or home security camera records in a continuous loop, overwriting the same card thousands of times over. Standard microSD cards are not built for that duty cycle and they fail — usually without warning, so you find out when you need the footage and it is not there. This card exists for exactly that job, and its 4.7 average across 9,724 ratings is the best score-and-sample combination in this ranking.

SanDisk rates it for continuous recording and pairs that with Class 10, U3 and V30, so it still handles Full HD and 4K capture properly rather than trading all its performance for longevity. Build is the usual SanDisk standard: temperature-proof, waterproof, shockproof and X-ray-proof.

One figure to treat with care. This 64GB listing quotes up to 20,000 hours of recording, while SanDisk's own 128GB High Endurance listing quotes 10,000 hours — which is backwards, since a larger card normally spreads writes further and lasts longer. One of the two numbers looks wrong, so take the endurance claim as directional rather than exact. At £25.47 it is dearer than faster cards here, but for a device that records all day every day it is the only sensible pick on this list.

At £13.99 with 12,544 ratings, this is the strongest combination of low price and real evidence on the list. It is the second cheapest card here and has more feedback behind it than every card above it except the SanDisk Ultra.

It publishes both figures — 100MB/s read and 30MB/s write — which is more honesty than several pricier cards manage, and carries an A1 rating that Netac quantifies as 1,500 read IOPS and 500 write IOPS. Durability claims cover shock, water, temperature, X-ray and magnets, and Netac makes the practical point that it survives airport security scanners, which matters if you travel with a drone or action camera.

One contradiction needs flagging before you buy. The product title lists U3 and V30, but Netac's own description says the card is 'speed Class U1/V10' — two very different guarantees. U1/V10 means a 10MB/s sustained write floor; U3/V30 means 30MB/s. The 30MB/s write figure quoted elsewhere in the listing suggests the truth sits at the V30 end, but with the listing contradicting itself, treat this as a Full HD card rather than a guaranteed 4K one.

The MS100 does something the Netac above it does not: it states U3 and V30 consistently throughout the listing, with no contradiction between the title and the description. For a card you intend to use for 4K, that clarity is worth more than a pound or two of price difference.

Biwin is an unfamiliar name to most UK buyers, but the company has spent decades manufacturing storage and memory components that end up inside other brands' devices, and the MS100 is its own consumer-facing card. Read speed is 100MB/s, and it is positioned explicitly for smartphones, tablets, home security cameras and dash cams rather than being sold as a phone card that might cope with a camera.

Environmental protection covers harsh temperatures, dust, shock and X-rays. The limitation is evidence: 458 ratings is the second-smallest sample on this list, so there is far less long-term feedback than on the SanDisk and Netac cards. At £15.49 it sits between the budget options and the SanDisks, and it is a reasonable pick if you want the V30 guarantee stated plainly without paying SanDisk prices.

At £13.59 this is the cheapest card in the ranking, and with 10,457 ratings it is far from unproven. If all you need is somewhere to keep photos, music and documents on a phone or tablet, it does that job for less than anything else here.

Be clear about what you are giving up, though. At 80MB/s read and 20MB/s write it is the slowest card on this list in both directions — the write speed is less than a quarter of the PNY's 90MB/s. It carries U1 and Class 10 only, with no U3, no V30 and no A rating, so 4K recording is not guaranteed and app performance from the card will be noticeably slower. KOOTION markets it for GoPros and drones in the title, but the speed classes do not back that up for 4K.

Its 4.3 average is the lowest here, and it is the only card in the ranking below 4.5. One detail suggesting the listing is copied across the product family: a bullet in the middle of this 64GB description refers to 'the 32 GB micro SD card' and its FAT32 formatting. For basic storage at the lowest price it is fine. For anything that records video, spend the extra £2.90 on the Netac.

Gigastone takes a useful approach to the endurance category: rather than saying a card suits dash cams generally, it names the brands it is built to work with, including REDTIGER, Rove, VIOFO, Vantrue, Pruveeo and Arifayz. If you own one of those and have burned through cards before, that specificity is reassuring.

The specification is decent for the job. Read and write run at 95 and 35MB/s, with A1, V30 and U3 ratings, so 4K capture is covered, and the TLC flash is the part doing the endurance work. It ships with an SD adapter and a mini case, and carries a 5-year limited warranty, longer than most cards here offer.

The problem is the comparison sitting four places above it. The SanDisk High Endurance does the same job for £25.47 — £4.52 less — with a 4.7 rating from 9,724 ratings against this card's 4.4 from 98. That is a hundred-fold difference in evidence for less money. Unless you specifically want the named dash cam compatibility or the 5-year warranty, the SanDisk is the safer buy at every level.

There is nothing wrong with the card itself. Samsung's six-way protection covers water, extreme temperatures, X-rays, magnets, drops and wearout, transfer speed is quoted at up to 160MB/s, an SD adapter is included, and the 4.7 average is the joint highest here.

The difficulty is what it costs relative to what it offers. At £32.99 it is the second most expensive card on this list, £0.515 per gigabyte, yet it carries only a UHS-I U1 speed class — the same basic tier as the £13.59 KOOTION, and two steps below the U3/V30 of cards costing half as much. No write speed is published at all. For £20.99 the SanDisk Extreme gives you A2, V30, U3 and a stated 80MB/s write.

Its 183 ratings are also the smallest sample in the ranking, which is unusual for a Samsung card and suggests this particular listing is not the one most buyers are choosing. The listing also notes performance varies by capacity and quotes availability up to 1TB, so the 160MB/s figure may describe larger cards in the family rather than this 64GB one. Buy Samsung by all means, but check the PRO range rather than this listing.