Owners of Xiaomi Redmi 9A sooner or later face a lack of internal memory - only 32 GB on the basic version, of which the user is available about 22-25 GB. Even after cleaning the cache and removing unnecessary applications, free space melts before your eyes: photos in HEIF, MIUI updates, YouTube cache and TikTok eat precious megabytes. The solution is one - a microSD card for 128 GB. But how much it costs in 2026, where to buy at a fair price and how not to run into the "Chinese miracle" with real 16 GB instead of the declared?
Many people mistakenly think that any microSD is suitable for Redmi 9A, but it is not. Smartphone supports cards up to 512 GB, but with reservations: maximum read/write speed is limited to UHS-I (U1) class, and to record video in 4K or run applications from the card will require a class A2. If you ignore these nuances, you can get a “brake” when opening photos, lags in games or even loss of data. Next – detailed analysis of prices, compatibility and life hacks of choice.
Current prices for 128 GB memory cards for the Redmi 9A in 2026
The cost of a 128 GB microSD ranges from 800 to 3,500 rubles depending on the brand, speed class and place of purchase. In early 2026, the market experienced a price jump due to a shortage of memory chips, but by the summer the situation stabilized.
| Brand and model | Class speed | Price (rupe) | Where is it cheaper? |
|---|---|---|---|
| SanDisk Ultra A1 | UHS-I U1, A1 | 1 200–1 500 | Wildberries (stocks) |
| Samsung EVO Select U3 | UHS-I U3, A2 | 1 400–1 800 | Ozon (with promo code) |
| Kingston Canvas Go! Plus | UHS-I U3, A2 | 1 300–1 600 | SberMegaMarket |
| Silicon Power Superior | UHS-I U1, A1 | 900–1 200 | Local shops (availability to specify) |
| Transcend High Endurance | UHS-I U3, V30 | 1 800–2 200 | M. Video (installment) |
⚠️ Note: Prices on AliExpress can be lower by 20-30%, but the risk of running into a fake increases by 5 times. Check the reviews with photos and videos, where you can see the packaging and the results of the speed test (for example, through CrystalDiskMark).
What speed class is needed for Redmi 9A: U1 vs U3 vs A2
Xiaomi Redmi 9A
microSD
UHS-I
- 🔹 UHS-I U1 (10MB/s of recording – minimum option for storing photos and music, suitable if you are not shooting videos in Full HD And you don't install apps on the map. SanDisk Utra A1 Silicon Power – representatives of the.
- 🔹 UHS-I U3 (up to 30 MB/s of recording – the best choice for recording video in 1080p And launching lightweight apps. EVO Select or Kingston Canvas Go! will provide smooth operation.
- 🔹 A1/A2 — launcher. A2 (before 4 000 IOPS) It speeds up WhatsApp, Telegram and games like Brawl Stars. Without this class, apps will be hanging».
- 🔹 V30/V60 — video-class 4K. For Redmi. 9A This is because the camera is shooting at most. 1080p@30fps.
Critical information: If you plan to install apps on a memory card (Adoptable Storage feature in MIUI), be sure to choose a model with a class A2. Otherwise, Google Play and social networks will slow down with each update.
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Before buying, check if your Redmi 9A supports Adoptable Storage. To do this, go to Settings → Memory → Memory Map and see if there is an option to “Use as internal memory”.
Where to buy cheaper: comparison of sites and life hacks
The price of the same card can vary by 30-50% depending on the seller.
- 🛒 Wildberries – there are often shares (for example, SanDisk Ultra 128 GB for 1,199 rubles.
- 🛒 Ozon is easy to deliver and pay when you receive it. Use promo codes (e.g, OZON300 discount.).
- 🛒 AliExpress - prices from 700 rubles, but the risk of running into "broken" cards or fakes under Samsung%+ and number of orders >1 000.
- 🛒 Local stores are sometimes cheaper than online (for example, Silicon Power for 950 rubles in the Messenger), but the choice is limited, and authentication is more difficult to verify.
View the package (the original has a hologram and serial number)
Check the speed through CrystalDiskMark (must match the stated speed)
Download a 10GB test file and write/read it
Verify the serial number on the manufacturer's website (for SanDisk and Samsung)
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⚠️ Attention: Avito and Yula often sell "beuch" cards under the guise of new ones. Pay attention to the wear of contacts and the presence of scratches. Ask the seller to photograph the test results in the test. A1 SD Bench.
Top.-5 memory-card 128 GB for Redmi 9A: price-per-view
Based on speed tests, user feedback and MIUI compatibility, we have compiled a ranking of the best options:
| Place. | Model | Speed (read/write) | Pluses | Cons |
|---|---|---|---|---|
| 1 | Samsung EVO Select U3 A2 | 100/90 MB/s | Reliability, 5-year warranty, optimal for applications | Price above average |
| 2 | SanDisk Ultra A1 | 120/40 MB/s | Good price/quality ratio, prevalence | Not suitable for 4K recording (but Redmi 9A doesn't support it) |
| 3 | Kingston Canvas Go! Plus A2 | 170/90 MB/s | High speed, suitable for games | Overheated during long recording |
| 4 | Silicon Power Superior A1 | 85/45 MB/s | Lowest price, good for photos and music | Not suitable for installing applications |
| 5 | Transcend High Endurance U3 | 95/85 MB/s | Resistant to temperature changes, durable | Expensive for their own characteristics |
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For most Redmi 9A users, the best choice is the SanDisk Ultra A1 or Samsung EVO Select U3, which covers 90% of tasks (photos, videos, lightweight apps) without overpaying for unnecessary features.
How to install a memory card in Redmi 9A and configure it correctly
Even the most expensive card is useless if it is not installed or configured correctly.
Insertion of the map:
- ⚙️ Turn off your smartphone (required!).
- ⚙️ Find the microSD slot on the left side (under the tray for the SIM-map).
- ⚙️ Use a paper clip to extract the tray, put the card with contacts down.
- ⚙️ Put the tray back before the click.
Configure in MIUI:
- ⚙️ Attention! When you select internal memory, the card will be formatted and cannot be used in other devices without losing data.
Data portability:
- ⚙️ For application transfer: Settings → Annexes → Select an application → Warehouse → Change. → Memory map.
- ⚙️ To transfer photos / videos: use the Xiaomi Gallery or Files by Google.
What to do if your phone doesn’t see your memory card?
Frequent errors in the selection and use of memory cards
Many Redmi 9A users are experiencing problems due to their lack of nuance, and these are the most common mistakes and how to avoid them:
- 🚫 Formatting the map in NTFS. Android doesn’t support this format, but FAT32 exFAT.
⚠️ Note: If you have installed the Redmi card 9A Start slowing down, check it for authenticity with the help of the utility H2testw (Windows or A1 SD Bench (Android) Fake cards often have write speeds < 5 MB/s, which causes the lags.