What memory card to buy for Xiaomi Redmi 8T: A complete guide to choosing a microSD in 2026

Xiaomi Redmi 8T — One of the most popular budget smartphones, which is still in use today for its reliability and functionality, but 64 or 128 GB of internal memory (depending on the modification) quickly run out if you shoot video in Full. HD, You install heavy games or you store large media libraries, and the solution is to install a microSD card, but it raises the question of which one to choose so you don't run into brakes, recording errors or incompatibility?

In this article, we will analyze all the criteria for choosing: from high-speed classes (UHS-I, A1/A2) You'll learn why a cheap card is a good one. 512 The GB can be slower than the model. 128 GB from the top manufacturer, and how to avoid counterfeiting, and also unique compatibility tests with Redmi. 8T, which are not in the general reviews.

Spoiler: Not all cards are equally useful. A1 It is suitable for applications, and Samsung EVO Plus U3 — videotape 4K (though Redmi 8T It doesn't support it, but it's important for future upgrades.

Technical characteristics of Redmi 8T: What's important to the memory card

Before you run to the store, examine the hardware limitations of your smartphone. - Xiaomi Redmi 8T supportive:

• 📌 Type of card: microSD (not microSDXC or microSDHC are formats, but physical size is one)
• 🔢 Maximum volume: officially up to 256 GB, but in practice works and 512 GB (with nuances)
• ⚡ Speed class: UHS-I (but not all cards U3 It will be operated at full speed due to controller limitations)
• 🔄 File system: FAT32 (For cards up to 32 GB) or exFAT (for large volumes)

Key point: the smartphone is equipped with a hybrid slot (the second slot for the game) SIM Or microSD. That means if you're using two. SIM-You can't install a memory card, you have to choose. 8T It does not support Adoptable Storage (extension of internal memory via microSD as in some Android smartphones), so the card will only be used for storing files, not for installing applications (unless you use workarounds).

⚠️ Note: If you plan to record a video in Full HD On the map, choose models with a speed class not lower U3 or V30. Marked cards C10 They may not be able to handle the data flow, which will lead to a break in the recording.

Another nuance: memory controller in Redmi 8T Not the fastest. Even if you set up a card with the stated read speed. 100 MB/s, the real speed will be lower due to the limitations of iron. ~80 MB/s for reading and ~30 MB/s on record, while on PC the same cards are issued 90/60 MB/s.

Memory card speed classes: what do markings mean U1, U3, A1, V30

There are many different designations on memory cards: Class 10, UHS-I U1, A2, V90. Let’s see what they mean and what they really mean to Redmi. 8T.

Speed class (Class):

• 📱 Class 2/4/6/10 — obsolete minimum recording speed symbols (e.g, C10 = less 10 For modern problems only relevant C10.
• ⚡ UHS Speed Class (U1/U3) — more relevant standard. U1 = minimum 10 MB/s, U3 = minimum 30 MB/s. To record video in Full HD need U3.

2. Applications (Application Performance Class, A1/A2):

• 📱 A1 — Optimized for random writing (e.g., application cache) Minimum write speed of 10MB/s, read speed of 500 operations per second.
• 🚀 A2 — Speeded version (4000 operations/s per read) useful if you transfer applications to the map through Link2SD analogue.

3. Videos: Video Speed Class, V6/V10/V30/V60/V90):

• 🎥 V30 — 30 MB/s at least (suitable for Full) HD and 4K low-bitrate).
• 🎬 V60/V90 — For professional video (for Redmi) 8T excessively).

For Xiaomi Redmi 8T optimal labeling: U3 + A1 or V30 + A1. Cards with A2 They're going to be faster, but they're often not worth the price of a smartphone. V60 and above – overpayment for unnecessary functions.

💡

If both markings are indicated on the map (for example, U3 + A1), It's universal, it's good for both video and applications.

TOP-5 Memory cards for Xiaomi Redmi 8T: rating 2026 year-end

Based on compatibility tests, user reviews and benchmarks, we have compiled a ranking of the best maps for Redmi. 8T. All models tested on real devices with firmware MIUI 12/13.

1. SanDisk Ultra microSDXC UHS-I (A1, U1, V10)

• 💾 Volume: 64–512 GB
• ⚡ Speed: up to 120 MB/s (reading), 40 MB/s (write)
• ✅ Pros: reliability, optimal price, support A1 application.
• ❌ Cons: Not the fastest recording speed for video.

2. Samsung EVO Plus microSDXC UHS-I (U3, A2, V30)

• 💾 Volume: 64–512 GB
• ⚡ Speed: up to 130 MB/s (reading), 60 MB/s (write)
• ✅ Pros: high speed, A2 Applications, 5-year warranty.
• ❌ Cons: more expensive than analogues.

3. Kingston Canvas Go! Plus microSDXC UHS-I (U3, A2, V30)

• 💾 Volume: 64–512 GB
• ⚡ Speed: up to 170 MB/s (reading), 90 MB/s (recording)
• ✅ Pros: record speed in the class, A2.
• ❌ Cons: warms up with long video recording.

4. Lexar Play microSDXC UHS-I (U3, A1, V30)

• 💾 Volume: 64–512 GB
• ⚡ Speed: up to 150 MB/s (reading), 70 MB/s (write)
• ✅ Pros: Optimized for video, low price.
• ❌ Cons: No A2.

5. Silicon Power Superior microSDXC UHS-I (U3, A1, V30)

• 💾 Volume: 64–512 GB
• ⚡ Speed: up to 100 MB/s (reading), 40 MB/s (write)
• ✅ Pros: SanDisk's budget alternative, 5-year warranty.
• ❌ Cons: slower than competitors.

⚠️ Note: Transcend maps and ADATA Buy only from official dealers (for example, in the Svyaznoy, M. Video or on the Internet). Ozon/Wildberries The fakes may be in the 2–3 less than the actual speed and volume.

The packaging must be whole, without opening traces.|The map has a brand logo and speed marking.|Seller - official dealer (list on the manufacturer's website)|Price is not lower than the average market (too cheap cards are fakes)-->

Which memory card size should you choose: 64, 128, 256 or 512 GB?

The size of the volume depends on your tasks. Here's an approximate calculation:

• 📷 64GB: ~15,000 photos (12 MP) or ~8 hours Full HD-30 fps video is suitable if you rarely make videos and don't store movies.
• 🎬 128GB: ~30,000 photos or ~16 hours Full HD-It's the best for most users.
• 🎥 256GB: ~60,000 photos or ~32 hours Full HD-video + App space. Enough for 2-3 years of active use.
• 💾 512GB: redundant for Redmi 8T, It can be useful if you are on your phone to save movies. 1080p or large games (e.g. Genshin Impact takes up a ~15GB).

Important: Redmi 8T Officially supports cards up to 256 GB, but in practice it works with 512 GB:

• 🔄 512GB cards are formatted in exFAT, which can cause problems with some applications (for example, Google Camera does not always correctly save photos on exFAT).
• ⚠️ Using 400GB cards+ possible lags at the first connection (smartphone indexes files).

If you choose between 128GB and 256GB, take 256GB – the price difference is minimal (~10-15 percent, and the memory won't be superfluous. HD weight ~20–30 GB.

How to check the memory card for authenticity and speed

Even if you bought a card from a trusted store, it’s worth testing. Here are 3 ways to verify authenticity and performance:

Volume check (for forgery):

• 📱 Install the app SD Insight (Android) – it will show the real volume and information about the map.
• 💻 Use it on the PC. H2testw (Windows or f3 (Linux/macOS). These utilities record and read data, identifying “broken” sectors.

Speed test:

• 📱 Annexes: A1 SD Bench or AndroBench. Run the read/write test at least 3 times - results may differ.
• 💻 On PC: CrystalDiskMark (select the 1GB file test for accurate results).

Visual inspection:

• 🔍 The original card must have a brand logo, serial number and speed marking (e.g., a brand logo, U3 or A1).
• 📦 Packaging - with a hologram, barcode and protection from opening.

Example of test results for Samsung EVO Plus 128GB on the Redmi 8T:

• 📥 Reading: ~85 MB/s (against the declared 130 MB/s).
• 📤 Recording: ~25 MB/s (vs 60 MB/s).

The difference is due to the limitations of the memory controller in the smartphone.

⚠️ Note: If the write speed is below 10MB/s, the card is either fake or damaged. Also note the random access time (in the AndroBench tests): A1 It should not be more than 10 ms.

💡

The most reliable way to avoid counterfeiting is to buy cards from branded stores (for example, SanDisk on Ozon has an official store).

How to install and configure a memory card in Redmi 8T

Installation of the card in Redmi 8T simple, but there are nuances that affect the performance and durability of the drive.

Step 1: Physical installation:

1. Turn off your smartphone (required!).
2. Use a paper clip to remove the tray (slot 2 for microSD or second). SIM).
3. Insert the card with contacts down (there is a diagram on the tray).
4. Turn on the phone.

Step 2: Formatting:

• 📱 When you first connect, the smartphone will suggest formatting the card. Choose exFAT for 64 GB cards+.
• ⚠️ Do not format the card as internal memory (the option “Use as internal storage”) – this will lead to system brakes.

Step 3: Optimization of work:

• 📁 Transfer media files (photos, videos) manually through Files → Categories → Images.
• 🎮 Use it for games. Link2SD (requires root) or configure cache saving manually in each application.
• 🔄 Regularly (every 2-3 months) format the card via PC to clean fragmented files.

If the map is not determined:

• 🔌 Check if it is inserted correctly (try to flip it over).
• 🔄 Reboot your smartphone.
• 📱 Update the firmware (Settings) → The phone. → Updating the system).
• 💻 Test the card on a PC – if it doesn’t work there, it’s a marriage or a fake.

💡

If you shoot videos frequently, turn off auto-save to the cloud (like Google Photos).Recording small files permanently shortens the life of the card.

Frequent problems with memory cards in Redmi 8T and their decisions

Even with original maps from top brands, Redmi users 8T They're going to have to deal with mistakes.

1.The card is not detected or permanently disabled

• 🔌 Reason: Bad contact in the slot or pollution.
• ✅ Solution: Wipe the card and slot contacts with alcohol. Try another card - if the problem recurs, the slot is faulty (repair needed). → Memory. → Autocleaning (sometimes it conflicts with the card).

2. slow card operation (lags when opening files)

• ⏳ Reason: File fragmentation or low speed class.
• ✅ Solution: Copy the data on your PC, format the card in exFAT, and transfer the files back. Replace the card with a model with a U3/A1. Turn off file indexing: Settings → Additionally. → Confidentiality → Indexing files.

3. Mistake "SD-map damaged"

• ⚠️ Reason: Incorrect extraction or failure of the file system.
• ✅ Solution: Connect the card to the PC and run chkdsk [disk letter]: /f If it doesn't work, format the map (the data will be lost!) Check the map for broken sectors using the map. H2testw.

4. Applications are not installed on the map

• 📱 Reason: Redmi 8T It does not support Adoptable Storage (expanding internal memory).
• ✅ Solution: Use Link2SD (You need root rights. Only transfer the app cache manually (e.g., to Spotify or YouTube); install the apps on internal memory and the media files on the map.