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Nvidia doesn’t officially endorse any specific card brand, but does specify a minimum 10MB/s sequential write speed — in practice, a card rated for 100MB/s+ read and 30MB/s+ write gives noticeably smoother app installs and game loading. The Shield TV supports cards up to 2TB, so capacity is really about your media library size.
| # | Product | Price | Where to buy |
|---|---|---|---|
| 1 | SanDisk Extreme 128GB | $18–$25 | Amazon · eBay |
| 2 | Samsung EVO Select 256GB | $20–$28 | Amazon · eBay |
| 3 | SanDisk Ultra 256GB | $16–$22 | Amazon · eBay |
| 4 | Lexar Professional 1066x | $18–$26 | Amazon · eBay |
The picks, in detail
SanDisk Extreme 128GB
An excellent all-around choice with 190MB/s read speeds and an A2 app-performance rating for faster game and app loading.
- 190MB/s read speed
- A2 rating for app performance
- Rugged, durable build
- Well above the Shield TV’s practical speed needs for smooth performance
- A2 rating specifically helps with game/app load times
- Durable build for a device that stays plugged in continuously
- Premium pricing versus basic Class 10 cards
- 128GB may be tight if you’re storing a large 4K media library
Samsung EVO Select 256GB
Great speeds up to 130MB/s paired with ample 256GB storage for a larger app and game library.
- Up to 130MB/s read speed
- 256GB capacity
- Waterproof and temperature-resistant
- More capacity than the SanDisk Extreme 128GB for the same rough price tier
- Strong Samsung reliability reputation
- Durability features suit a device left running continuously
- Slightly lower peak read speed than the SanDisk Extreme
- Larger capacity means more data at risk if the card ever fails
SanDisk Ultra 256GB
A more budget-friendly option with 100MB/s read speed — more than enough for the Shield TV’s actual performance needs — plus a 10-year warranty.
- 100MB/s read speed
- 256GB capacity
- 10-year manufacturer warranty
- Good balance of price and capacity
- 10-year warranty is longer than most competitors offer
- More than sufficient speed for smooth Shield TV performance
- No A2 app-performance rating like the Extreme line
- Write speed is more modest than the Extreme’s rating
Lexar Professional 1066x
A high-speed alternative from another top-tier flash memory brand, good if you want to diversify away from SanDisk/Samsung.
- 1066x speed rating (~160MB/s)
- UHS-I interface
- Multiple capacity options
- Strong speed rating comparable to the SanDisk Extreme
- Reputable alternative brand
- Good capacity range to match your library size
- Less specifically discussed in Shield TV owner communities than SanDisk or Samsung
- Retail availability varies more by region than SanDisk
Buying tips
- Prioritize a 100MB/s+ read and 30MB/s+ write rating — this is the practical minimum for smooth game loading, well above Nvidia’s stated bare-minimum spec of 10MB/s write.
- An A2 performance rating (like the SanDisk Extreme) specifically helps with random read/write patterns typical of app and game loading, not just sequential file transfers.
- Since the Shield TV usually stays plugged in and running continuously, a card with waterproof/temperature-resistance ratings (Samsung EVO Select) adds a bit of extra long-term reliability margin.
As an Amazon Associate and eBay Partner, toptenpick.com earns from qualifying purchases. Prices and availability are subject to change.