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Scan for outdated or missing drivers - takes under a minuteDriver Scan →Clear out junk files and repair common Windows errorsFree Scan →Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →First check whether your exact Samsung Galaxy model has a microSD slot and what maximum capacity Samsung lists for your country and variant. Only then choose a card. For high-resolution video, Samsung recommends microSDXC; for photos and ordinary file storage, a lower-demand microSD or microSDHC card may be enough. A card does not make every Galaxy phone expandable, nor does it automatically become extra internal storage.
Check that your exact Galaxy model accepts a card
Not all Samsung phones support microSD cards. Some have only a SIM slot, and models such as the Galaxy S21 series and certain Galaxy Z phones are listed by Samsung as having no external memory. Tray layouts also differ: some phones have a hybrid tray that holds either two SIMs or one SIM and a microSD card.
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- On the phone, open Settings > About phone and note the product or model name. Samsung Japan specifies Settings > About phone > Product name.
- Look up that exact model on Samsung’s support or specifications page for your country and carrier variant. Samsung warns that specifications can differ by region.
- Confirm that the phone has a microSD slot, whether the slot shares space with a second SIM, and the maximum card capacity Samsung lists.
- Choose a card at or below that model’s stated maximum. A card’s 1TB or 1.5TB label does not prove that your phone supports it.
Samsung’s UK compatibility table is explicitly for the UK and Ireland. It lists some Galaxy S20 models up to 1TB and the S21 5G series without external memory; those figures should not be treated as universal specifications. Samsung Japan’s list is separate, includes its own unsupported models and capacity groups, and gives a 1.5TB maximum for a specific model grouping. Use the list for your market rather than combining regional entries.
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Choose a capacity the phone supports
Samsung’s general guide groups cards by format: microSD is up to 2GB, microSDHC is up to 32GB, and microSDXC is above 32GB through 2TB. Those are card-family ranges, not a promise that any Galaxy phone accepts the family’s full range. The model-specific compatibility information takes precedence.
#1 Best Overall
- TRANSFER SPEEDS UP TO 800 MB/S: With sequential read speeds up to 800 MB/s, get into your game up to 4× faster than our standard microSD cards (UHS I)¹.
- DYNAMIC THERMAL GUARD: Keeps its cool even when the action heats up. Dynamic Thermal Guard helps reduce overheating for fast, smooth gameplay.
- ALL YOUR GAMES ON ONE TINY CARD: Store all your games and downloadable content (DLCs) with up to 512GB of reliable storage. No deleting. No compromises.
- 6-PROOF PROTECTION WITH 3-YEAR LIMITED WARRANTY: Built to last, made for peace of mind. Anything can happen when you’re gaming on the go. With 6 types of protection²⁻⁹, the P9 Express can handle it all—helping maintain your game progress.
- NEXT-GEN AND BACKWARD COMPATIBLE: Your microSD Express card is compatible with Nintendo Switch 2¹⁰ and microSD UHS-I¹¹ devices, including tablets, drones, cameras and more.
Estimate how much space you need for photos, video and other files, then compare that with the maximum for your handset. If you expect to record high-resolution video, Samsung recommends microSDXC on compatible devices. For still photos or basic file storage, Samsung says lower-demand microSD or microSDHC cards can be sufficient. Do not buy beyond the phone’s listed limit on the assumption that a newer or larger card will work.
Match the speed rating to what you do
Speed markings help describe a card, but they do not guarantee the speed a phone will achieve. Samsung’s general guidance lists Speed Class ratings 2, 4, 6, 8 and 10, with higher numbers indicating faster performance. For video recording, pay attention to a card’s video-speed rating and sustained write capability; for ordinary photo storage, a top-tier card is not automatically necessary.
Rank #2
- ALL THE SPACE YOU NEED: Store tons of media on your phone, load games or download more apps on your tablet at top-notch speed, making transfers seamless and reliable
- FAST AND SMOOTH: With superfast U3, class 10 rated transfer speeds of up to 130MB/s¹,²and UHS-I Interface³ big apps load and run smoothly, while 4K video remains sharp with A2, V30, and USH-I Interface
- EXPAND AND STORE BIG: Find your perfect fit from 64GB, 128GB, 256GB and 512GB; Select the best capacity for all your memories. Speed class: U3
- YOU'RE FULLY PROTECTED: EVO Select Plus provides reliable storage and takes on life’s adventures with water⁴, temperature⁵, X-ray⁶, ⁷magnet, drop⁸, and wears⁹ out protection; Backed by a 10-year limited warranty; Proofs are for the microSD card and do not include the adaptor
- FLASH MEMORY CARD: Performance and reliability you can count on from the flash memory brand; All firmware and components are produced in-house
For example, Samsung’s 2024 PRO Plus data sheet, revision 2.1, lists Class 10, U3, V30 and A2, plus sequential read speeds up to 180MB/s and sequential write speeds up to 130MB/s. The sheet defines V30 as a sustained video-capture rate of 30MB/s. It also defines A2 as an application performance class with specified random I/O and sustained sequential-write measures. These are product specifications, not a benchmark of a Galaxy phone.
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Samsung says those PRO Plus results were achieved with a Samsung SD card reader in controlled conditions; maximum rates require particular Samsung reader versions, and actual performance can vary with the host device and use conditions. A phone may not reach the advertised peak, and an A2 marking does not guarantee faster app operation on every handset. Choose for your workload and treat peak figures as card-and-test-condition claims, not a promise about phone performance.
Rank #3
- Compatible with Nintendo-Switch (NOT Nintendo-Switch 2)
- EXTREME ENDURANCE FOR MONITORING DEVICES: Capture your crucial moments in high-resolution, even in harsh conditions; Engineered to deliver long lasting performance, the Samsung PRO Endurance SSD is a perfect fit for CCTV, dash cams and body cams; Get peace of mind with video recording you can rely on
- BUILT TO LAST UP TO 140K HOURS OF RECORDING: With capacities up to 256GB, the PRO Endurance records and rewrites up to 140K hours (over 16 years); Plus, with a warranty up to 5 years, you can rest assured that your data endures
- RECORD & PLAY IN FHD/4K: The PRO Endurance simplifies large file transfers with read/write speeds up to 100/40MB/s; Plus, FHD and 4K resolution support ensures that crucial moments are recorded in high-res so every detail is documented when it matters most
- CRITICAL DATA, SAFEGUARDED: From severe weather to extensive wear and tear, the PRO Endurance stands up to real-world situations; After rigorous testing, it stands up against magnets¹, X-rays², water³, drop⁴, wearout⁵, and stays cool under pressure with operating temperatures ranging from -25°C to 85°C⁶
Understand what the card can—and cannot—store
A microSD card is removable storage, not necessarily an extension of internal storage. Samsung says its Android devices do not support Adoptable storage, the feature that combines a card and internal storage into one volume. Storage behavior can vary by app; some apps may let you choose an SD card as the default location, but do not assume that apps can generally be installed or moved there.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Install the card without damaging the phone
Use the instructions for your exact handset because tray positions and layouts vary. Samsung’s setup guidance says to check whether the tray is hybrid and place the card in its designated position with the gold contacts facing down. Identify the tray outline before using the ejector tool; Samsung cautions against inserting it into microphone or speaker holes. Consult the phone’s manual if the tray position is unclear.
Rank #4
- EXPAND YOUR STORAGE. Insert your card to add massive storage up to 1.5TB[1] to your Android smartphones and tablets, digital cameras, and laptops.
- SPACE FOR MORE. With expansive capacities up to 1.5TB[1], capture and store hours of Full HD video[4], movies, music, games, photos, and podcasts.
- MOVE FILES FAST. Use your card with the SANDISK QuickFlow microSD UHS-I Card USB-A Reader[6] to achieve up to 195MB/s[2] read speeds [128GB-1.5TB models] and offload your content fast.
- LOAD APPS IN A SNAP. Rated A1[3], the SANDISK Ultra microSD card is optimized for faster app launch and overall app performance.
- EASY CONTENT MANAGEMENT. Easily back up, organize, and transfer your photos and videos with the SANDISK Memory Zone desktop or Android mobile app[5].
Decide whether you need an adapter or reader
If you regularly move files to a computer, a card reader or adapter can be useful. Check that the reader supports the card and its interface; the PRO Plus data sheet’s headline speeds depend on specified Samsung readers, so those figures should not be assumed for an arbitrary reader. The phone’s own compatibility and speed limits still apply when the card is installed in the handset.
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