Xiaomi Redmi 8 is still a popular budget smartphone, despite the release of new models. One of its key limitations is internal memory — only 32 or 64 GB in the basic versions. The solution is simple: a microSD card with 128 GB. But how much is it worth today, which brands are more reliable, and where to buy it cheaper — without overpaying and counterfeiting?
In this article, we will discuss the current prices for a 128 GB microSD for Redmi 8 (including Redmi 8A and Redmi 8A Dual models), compare offers on AliExpress, Wildberries, Yandex Market and in offline stores. You will also learn how to choose a card by speed (class A1, A2, U3), avoid fakes and install it correctly.
1. Compatibility: Which memory card does the Xiaomi Redmi 8 support?
Smartphone Xiaomi Redmi 8 is equipped with a microSD slot (separate or hybrid, depending on the modification) with support for cards with a capacity of up to 512 GB.
- 🔹 Maximum capacity: officially 256 GB, but in practice, 512 GB work (for example, SanDisk Ultra).
- 🔹 File system format: for maps >32GB is used by exFAT (automatically determined by phone).
- 🔹 Speed class: minimum – Class 10 (10 MB / s), optimal — UHS-I U3 or A2 record 4K-video.
- 🔹 Hybrid slot: in versions with 2 SIM You have to choose the cards. SIM microSD.
Important! UHS-II cards (with two rows of contacts) will not physically fit - the slot in Redmi 8 only supports UHS-I. Also avoid cards labeled HC (up to 32 GB) - they are ineffective for modern tasks.
2.Prices for 128GB memory cards in 2026: Brand comparisons
The cost of a 128 GB microSD varies depending on the brand, speed and place of purchase, below are the current prices for June 2026 (in rubles) for popular models:
| Brand and model | Class speed | AliExpress | Wildberries | Yandex Market | Offline (M.Video, Connected) |
|---|---|---|---|---|---|
| SanDisk Ultra A1 | A1, U3, 100 MB/s | 950–1 200 ₽ | 1 100–1 350 ₽ | 1 200–1 450 ₽ | 1 400–1 600 ₽ |
| Samsung EVO Plus | A2, U3, 130 MB/s | 1 000–1 300 ₽ | 1 200–1 400 ₽ | 1 300–1 500 ₽ | 1 500–1 800 ₽ |
| Kingston Canvas Go! Plus | A2, U3, 170 MB/s | 1 100–1 400 ₽ | 1 300–1 500 ₽ | 1 400–1 600 ₽ | 1 600–1 900 ₽ |
| Silicon Power Superior | A1, U3, 90 MB/s | 800–1 000 ₽ | 950–1 100 ₽ | 1 000–1 200 ₽ | 1 200–1 400 ₽ |
| NoName (no brand) | Class 10, 20-40 MB/s | 500–700 ₽ | 600–800 ₽ | 700–900 ₽ | 900–1 100 ₽ |
Critical information: Non-branded cards (NoName) often have understated real capacity (for example, instead of 128 GB – 64 GB) and low speed. the risk of data loss when using such cards increases by 3-5 times.
The best deals are usually on AliExpress (especially during sales), but delivery takes 2-4 weeks. For quick purchases, it is better to choose Wildberries or Yandex Market - there are often discounts when paying with a card.
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The best price-performance ratio is the SanDisk Ultra A1 or Samsung EVO Plus, which is 20 to 30 percent more expensive than NoName, but 5 times more reliable.
3. Where to buy a memory card cheaper: online vs offline
The price difference between online and offline can be as high as 30-50%, and consider the pros and cons of each option:
- 🌍 AliExpress: lowest price, but long delivery (10-30 days), the risk of running into a fake is about 15%+ and >1 000.
- 🛒 Wildberries/Ozone: price 10–20% higher than AliExpress, but delivery is fast (2–5 There are often "free delivery" promotions".
- 🏢 Yandex Market: Prices are comparable to WB, But you can compare the offers from different stores, and sometimes you get fake brands.
- 🏠 Offline stores (M.Video, Svyaznoy, Eldorado): the highest price, but you can check the card on the spot.
If you need a card today, you better go to an offline store and choose SanDisk or Samsung — even at a margin, it is more reliable than a cheap NoName. If time is tight, order AliExpress from trusted sellers (for example, SanDisk Official Store or Samsung Official Store).
⚠️ Attention! AliExpress often sells gray cards (such as SanDisk, made for the domestic market of China), which are cheaper, but may not have an official guarantee in Russia".
How to choose a memory card: 5 key parameters
It's not enough to buy a 128GB card, but you have to consider speed, class, brand, and even country of manufacture.
- Class speed: 📱 Class 10 (10 MB/s – minimum for photos and music. 🎥 U3 (30 MB/s - for Full Video HD. 🎬 A1/A2 — for applications 4K-Video (optimum for Redmi) 8).
Brand
SanDisk
Samsung
Kingston
Silicon Power
Transcend
Country of production
Guarantee
AliExpress
Packaging
☑️ Checking a memory card before buying
For Xiaomi Redmi 8, the best choice is the SanDisk Ultra A1 or Samsung EVO Plus A2. They provide stable work with applications (if you transfer them to the map) and fast video recording.
5. How to install a memory card in Xiaomi Redmi 8: Step-by-step instructions
The process of installing a microSD in Redmi 8 is simple, but there are nuances with the setup.
- Turn off the phone (required!) Remove the tray for SIM-cards with a paper clip (hole on the right).
- Put the memory card in a microSD slot (usually marked as TF). If you have a hybrid slot, choose a second SIM or card.
- Put the tray back in before you click. Turn on the phone.
- After downloading, a notification will appear “New”. SD-Map. Press Set up.
- Select a use case: 📱 Portable storage - for photos, videos, music. 🔄 Internal memory – for installing applications (requires formatting!).
Attention!
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If the card is not determined, try formatting it in your phone: Settings → Warehouse → SD-map → Format. Use exFAT for maps. >32GB.
⚠️ Attention! If you have selected Internal Memory mode, do not remove the card without first "safe retrieval" in the settings. This can cause the applications installed on it to crash.
6.Frequent memory card issues in Redmi 8 and their solutions
Even the original maps sometimes work in an unstable way, and the problems and ways to fix them are:
| Problem. | Possible cause | Decision |
|---|---|---|
| Phone doesn't see the map | Bad contact, incompatible format | Reboot your phone, check the slot, format the card in exFAT |
| The card is defined as "damaged" | File system crashes, fake. | Formatting via PC (use SD Formatter) |
| Slow recording/reading | Class 10 card instead of U3 | Replace with a card marked A1/A2 or U3 |
| Applications are not installed on the map | The map is formatted as a "portable storage" | Reconfigure as “Inner Memory” (with loss of data!) |
What if the card is “off” and the phone can’t see it?
If the card starts to "glutch" after a few months of use, this can be a sign of the end of the memory cell life (especially in cheap models), on average, a quality microSD lasts 3-5 years with heavy use.
7. Memory card alternatives: what to do if 128GB is not enough?
If you are short of 128GB, there are a few solutions:
- 🖥️ Cloud storage: Google Drive (15 GB free), Yandex Drive (10 GB), Mi Cloud (5 GB). Minus - you need a stable Internet.
- 📁 Outside SSD/HDD: through OTG-The adapter can be connected to the storage device 2 TB: Speed is faster than microSD, but it’s uncomfortable to carry around.
- 📱 Phone Replacement: If the Redmi 8 is already failing, consider models with more internal storage (like the Redmi Note 12 with 256GB).
- 🔄 Memory optimization: Remove the app cache (Settings) → Annexes → Clear cache, transfer photos to the cloud, use Lite versions of applications.
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For most Redmi 8 users, a 128GB microSD combination + Cloud storage (e.g. Google Photos with unlimited compressed photos) completely solves the problem of memory shortage.