Why Redmi Note 8 Pro Memory Card and What Limits Are There
The Xiaomi Redmi Note 8 Pro, released in 2019, is still a popular choice due to its price-performance balance. However, its built-in memory (64 to 128 GB depending on the modification) can run out quickly — especially if you shoot 4K video, install heavy games or store large collections of music. The solution is to install a microSD card, but there are nuances here.
Not all cards are suitable for this model. The manufacturer has imposed limits on the maximum volume, file system format and speed class. For example, cards over 256 GB are not officially supported, although some users successfully use 512 GB with firmware from third-party developers. In this article, we will analyze all the technical details so that you can choose the best option without risk to the device.
Official specs: what Xiaomi says about support for memory cards
According to the manufacturer’s specification, the Redmi Note 8 Pro supports microSD memory cards (including microSDHC and microSDXC) with the following parameters:
- 📏 Form factor: MicroSD only (not compatible with miniSD or SD adaptless).
- 💾 Maximum capacity: up to 256GB (officially) Some firmware allows 512GB, but it's not guaranteed.
- ⚡ Speed class: recommended UHS-I (U1 or U3) videotape 4K.
- 🔄 Slot: Hybrid (combined with SIM-The card, that is, you can use either 2 at the same time SIM + without a memory card, or 1 SIM + microSD.
Important: Xiaomi does not mention microSDUC support (up to 12TB cards) in the documentation, so using them can lead to read errors, and the device does not support NTFS - only FAT32 or exFAT (for cards > 32GB).
Compatible file formats and system: FAT32 vs exFAT
The file system of the memory card directly affects its work in the Redmi Note 8 Pro.
| Map format | Max. Volume. | File system | Compatible with Redmi Note 8 Pro |
|---|---|---|---|
| microSD | 2GB | FAT16 | ✅ Yes (but useless because of the small volume) |
| microSDHC | 4-32 GB | FAT32 | ✅ Yes (best for budgetary decisions) |
| microSDXC | 64 GB-2 TB | exFAT | ✅ Yes (recommended for cards) >32GB) |
| microSDUC | 12 TB | exFAT | ❌ No (not tested by the manufacturer) |
If you buy a card with a volume of more than 32 GB, it should be formatted in exFAT. Cards up to 32 GB usually come with FAT32 out of the box. NTFS is not supported - when you try to use such a card, the smartphone will prompt you to reformat it.
⚠️ Note: If you insert a card with NTFS If you agree to format via your smartphone, all data will be deleted.
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Before buying a card, check it for authenticity with H2testw (Windows) or F3 (Linux/macOS) utility, which will help you avoid counterfeiting with understated real capacity.
Speed classes: which to choose for video, games and everyday tasks
Memory card speed is critical for video recording, game launches and overall performance.Redmi Note 8 Pro supports the following classes:
- 🐢 Class 2/4/6/10: It's good for photos, music and lightweight apps. HD Minimum Class Requirement 10.
- ⚡ UHS-I (U1/U3): optimally 4K heavy-play. U3 The speed of the recording is not lower than 30 MB/s.
- 🚀 V30/V60/V90: Professional maps for high-resolution video. 8 Pros are redundant but compatible.
For most users, a card labeled U3 or V30 is enough. For example, SanDisk Extreme or Samsung EVO Plus of these classes will provide stable video recording in 4K@30fps without lags.
What happens if you use a slow card to 4K-video?
Top.-5 Memory cards for Redmi Note 8 Pro: Proven models
Based on user tests and official recommendations, we have compiled a rating of reliable maps for this model:
- SanDisk Extreme A2 (128 GB, U3, V30) — the best choice for games and 4K-Read/write speed before video. 160/90 MB/s.
- Samsung EVO Plus (256 GB, U3) – optimal price/volume ratio. Supports exFAT.
- Kingston Canvas Go! Plus (64GB, U3, V30) is a budget option for everyday tasks.
- Lexar Professional 1800x (128 GB, U3, V60) – for professional shooting, but more expensive than analogues.
- Transcend High Endurance (64GB, V30) – especially for DVRs and long-term recording.
Avoid nameless cards from China (for example, NoName 512 GB for 500 rubles) – they often have a real volume of 10-20 times less than the declared one and fail after a few months.
View reviews on the marketplace|Check the availability of certificates (SD Association)|Compare the price with official dealers|Use a utility for a speed test (e.g., CrystalDiskMark)-->
How to insert and configure a memory card: step-by-step instructions
The process of installing the card in the Redmi Note 8 Pro is simple, but there are a few nuances:
- Turn off your smartphone (required!).
- Use a paper clip or special key to remove the tray SIM-map (hole on the right).
- Place the microSD card in the top slot of the tray (bottom - for nano-SIM).
- Put the tray back in before the click.
- Turn on the phone and wait for the identification of the card (notification will appear in the curtain).
After recognizing the card, go to Settings → Memory → Memory Map and select one of the options:
- 📁 Portable storage: the card is used only for files (photos, videos, music).
- 📱 Internal memory: the card is formatted and becomes part of the system (you can install applications). ⚠️ Note: When you choose this option, all data on the map will be deleted, and the map itself will be encrypted. Once removed, the map will not be read on other devices without resetting the smartphone settings.
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For most users, Portable Storage is optimal. Internal Memory mode slows down the card and can lead to errors when it is retrieved.
Frequent problems and their solutions
Even with compatible cards, there can be errors.
- 🚫 "Map corrupted" or "Not supported": Causes: Incorrect file system (NTFS), Physical damage or fake card Solution: format the card in exFAT via PC (use SD Formatter from SD Association).
- 🐢 Slow work: If the class card U1 slow down 4K, replace her with U3. Also check if the card is filled in at 90%+ — slows down.
- 🔄 Smartphone doesn't see the card: Try restarting the device, cleaning the contacts of the card with a smooth or inserting it into another slot (for example, through an adapter in a laptop). If it doesn't help, the card is faulty.
If the card is no longer defined after the MIUI update, reset the storage settings to Settings → Memory → Reset. This will not delete the data, but will reboot the memory management module.