Jan 02, 2020 The faster MicroSD card for Microsoft Surface. Available from 32GB to 256GB. Class 10 / UHS 3, 100MB/s read and 90MB/s write speed. 4-proof protection from water, extreme temperatures, and other harsh conditions. Included SD adapter.
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For some users, the included 64GB or 128GB of internal storage found in the Microsoft Surface Go may not be enough. Thankfully, unlike Apple and its iPad, Microsoft included the option to expand that storage with a microSD slot.
For the purposes of this story, we focused on 64GB memory cards. So which one should you get? The fastest and most expensive (Delkin, $80) or the best-selling and cheapest (Silicon Power, $15)? And what can you do with that card in Windows 10 and the Surface Go?
Check out this new Surface Go guide to microSD cards for answers.
Using a microSD card on Surface Go is very simple. You just slide it into the slot under the Surface Go's kickstand.
Windows 10 will recognize the drive, and you can begin using it right away. However, if you want to use it for apps, games, and more you need to tell the OS to do so.
What can you do with expandable storage in Surface Go?
Back in the day, SD memory cards were treated merely as external storage that you could keep photos or media on but not install apps or games, limiting their usefulness. By contrast, Windows 10 lets users mainly do anything they want with an SD or microSD card.
By heading to Settings > Systems > Storage > Change where new content is saved, you can choose to have the following put on a microSD card for the Surface Go:
- New apps.
- New documents.
- New music.
- New photos.
- New movies and TV shows.
- Offline maps.
If you already have apps or games installed to the primary drive on the Surface Go, you can navigate to Settings > Apps > Apps & features and move existing software to the newly-mounted microSD card (see above image).
There are limitations, however. So-called Windows 10 'inbox apps' like Mail, Camera, and Calculator, cannot be moved. Likewise, a developer can flag their app or game as not installable to an SD card due to degradation in performance (the popular YouTube app MyTube! is one example).
If you use the app or game frequently, keep it on the main drive and put rarely used apps or games on the microSD card. Even better, try to keep all apps and games on the main drive with just media (music, movies, photos, and documents) on the microSD card, because the performance hit is inconsequential for those items.
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The fastest microSD card isn't always the best
Surface Go owners obviously need to pick which card to purchase. Like all flash media, microSD cards range in speeds, class, size, and more.
For this test, we bought three microSD cards to use on the entry-level 4GB Surface Go:
- Silicon Power 64G ($15).
- Lexar Professional 1000x 64GB ($60).
- Delkin 64GB microSDXC 1900X ($80).
The Silicon Power and Lexar options are both Class 10 cards, but the Silicon Power is Ultra High-Speed Phase-1 (UHS-1), and the Lexar is UHS-II. UHS refers to the bus interface for the SD card, and UHS-II or even UHS-III is faster than UHS-1.
The Delkin is the most expensive and is a UHS-II Video Speed Class 60 (V60) meant for 4K video, high-speed photography, and more. It has theoretical read and write speeds of 285MB/s and 100 MB/s, respectively, compared to the 'professional' Lexar with 150MB/s and 45 MB/s.
Going by the rule of computers faster is always better, right?. But splurging for the $80 Delkin likely isn't the best choice here.
Using CrystalDiskMark we measured all three cards for sequential read and write speeds.
microSD card comparison
| Device | Price | Size | Read | Write |
|---|---|---|---|---|
| Silicon Power | $15 | 64GB | 79 MB/s | 44 MB/s |
| Lexar Pro | $60 | 64GB | 85 MB/s | 55 MB/s |
| Delkin | $80 | 64GB | 70 MB/s | 54 MB/s |
While the $60 Lexar is technically faster than the $15 Silicon Power, the price difference hardly justifies the gains. Meanwhile, the most expensive card – the $80 Delkin – had slower read speeds than the $15 Silicon Power on Surface Go.
In real-world file transfers between the Lexar and Silicon, we saw the following results using the Surface Go 4GB with 64GB of eMMC internal storage.
Transfer from card
- Silicon Power: 1.80GB (2x files) took 33 seconds to eMMC.
- Lexar Pro: 1.80GB (2x files) took 29 seconds to eMMC.
Transfer to card
- Silicon Power: 1.80GB (2x files) took 49 seconds to SD.
- Lexar Pro: 1.80GB (2x files) took 34 seconds to SD.
The Lexar is faster, but the differences are minor.
Surface Go storage speed comparison
The Delkin is a fast card, but it doesn't matter for the Surface Go.
Another real-world test is playing a 10GB MP4 video file in the Windows default video player. Both cards loaded up the video instantly and scrubbing (using the slider to jump to different parts of the movie) works without buffering or delays. There was no discernable difference.
| Device | Size | Type | Read | Write |
|---|---|---|---|---|
| Surface Go | 64GB | microSD | 70 to 85 MB/s | 44 to 55 MB/s |
| Surface Go | 64GB | eMMC | 260 MB/s | 145 MB/s |
| Surface Go | 128GB | SSD | 1,185 MB/s | 133 MB/s |
The Lexar and Delkin are not bad cards. The issue is the Surface Go does not seem capable of hitting more than 85 MB/s for read speeds (and 55 MB/s for write) on any card. That is likely a hardware issue although software or firmware could play a part too.
For comparison, the Delkin, when used with the Surface Book 2 (using the SD adapter), managed a respectable 224 MB/s for read and 69 MB/s for writes, confirming our suspicion about Surface Go hardware limitations.
That makes any purchase of an SD card for use solely with Surface Go with over 105 MB/s (anything above UHS-1/Class 10) not worth it.
Therefore, our recommendation is to buy the cheapest UHS-1/Class 10 micro SD card you can find with the storage amount you want (up to 512GB) for use exclusively with the Surface Go. Buying something that is faster or more expensive does not yield significantly better performance and is a waste of money.
The Silicon Power 64GB card used here has a 4.6-star rating on Amazon, ships free with Amazon Prime, and performs just as well as a more expensive card for casual use with the Surface Go.
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BestmicroSD Cards for Surface ProWindows Central2020
The latest Surface Pro 7 brings 10th Gen Intel Core processors and a USB-C port to a device that otherwise remains mostly the same from older models. That means you still have a microSD card reader with support for UHS-I speeds built into the Pro 7, ready to handle a bit of extra storage and quick transfers. If you don't already have a microSD card lying around or you want to upgrade to a card that will make the most of the reader in the Pro 3, Pro 4, Pro (2017), Pro 6, or Pro 7, here are our top picks.
U3 rating: Samsung EVO Select
Staff budget pickSamsung makes excellent storage, and it's no slouch in the microSD department. The EVO Select is available with up to 512GB of storage and has up to 100 MB/s read, and 90 MB/s write speeds. The 128GB is, no doubt, the best option for many people based on price for performance and size. A 10-year limited warranty is included for some extra peace of mind.
From $7 at AmazonUHS-I and UHS-II: Delkin Prime 1900X
Upgrade pickThe Surface Pro 7 might max out at UHS-I, but you can take advantage of the UHS-II speeds this card offers with your other devices. It remains compatible with the Pro 7 and previous models, and it's available in 64GB or 128GB sizes. It costs a bit more than other options, but read speeds up to 300 MB/s will make a difference when in use with other devices.
From $50 at AmazonAffordable option: Silicon Power
Silicon Power's UHS-I microSD card is about as cheap as you'll find, but it's well-rated and offers read speeds up to 100 MB/s and write speeds up to 80 MB/s. It might not be the fastest, but it will undoubtedly get the job done on the cheap, and there's a five-year limited warranty to protect your purchase.
From $7 at AmazonReliable storage: SanDisk Ultra
SanDisk offers eight different sizes in its Ultra lineup of microSD cards, starting with 16GB and going up to 512GB. This card is highly-rated and relatively cheap, making it a lethal combination with read speeds up to 100 MB/s. Go with the 200GB card to get plenty of storage at a great price.
From $6 at AmazonHigh-performance storage: Lexar Professional 1000x
This UHS-II microSD card (backward compatible with UHS-I) is relatively affordable but offers read and write speeds up to 150 MB/s and 80 MB/s, respectively, in compatible devices. Grab it in a 32GB size or go up to 256GB, and take advantage of a lifetime warranty to protect your purchase.
From $13 at AmazonIf we're picking a microSD card
Adding storage to your Surface Pro 7 doesn't have to happen before checkout. Thanks to the microSD card reader, you can carefully pick the right amount of storage, and save a good chunk of money in the process. Even if you have an older Pro model, they should all be compatible with the cards listed above. Still unsure which to grab first? We can make further recommendations.
Samsung's EVO Select is a reliable microSD option that comes at a very reasonable price. Thanks to a U3 rating, you get read speeds up to 100 MB/s and write speeds up to 90 MB/s, and you'll only pay about $17 for a 128GB card. You can go up to 512GB, which costs about $80. This is ideal if you're planning on only using the microSD card with your Surface Pro, as you're not paying for unnecessary UHS-II performance.
If, however, you do plan on swapping the microSD card between devices that can handle UHS-II performance, Delkin's 1900X is an excellent choice. It costs more at about $50 for a 64GB card, but you'll be able to hit up to 300 MB/s read speeds when used with compatible UHS-II devices. Despite its UHS-II classification, it should work fine in your Surface Pro, though at a reduced pace.
Looking for more hardware to complement your Surface Pro? Be sure to check out our roundup of the best overall accessories available now.
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