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Bambu Lab P1S SD card requirements

Best SD Card for Bambu Lab P1S

Expert recommendations based on Bambu Lab P1S specifications

Recommended Spec

microSD (UHS-I) (Class 10 / U1 or faster)

The P1S uses the same microSD workflow as the X1-Carbon. A genuine 32GB or 64GB Class 10 card formatted FAT32 is enough; faster cards don't change print quality.

Official Bambu Lab P1S SD Card Requirements

  • Format: microSD (UHS-I)
  • Minimum Speed: Class 10 / U1 (10 MB/s write)
  • Maximum Capacity: Up to 1TB (FAT32)
Why these requirements? The P1S uses the same microSD-based workflow as the rest of the Bambu ecosystem: the sliced file is read from the card and logs/timelapses are written back during the print. As the budget-flagship tier, it pairs naturally with a sensible mid-priced card rather than a premium one. There is no print-quality benefit to an expensive high-speed card here. A genuine SanDisk Ultra or Samsung EVO Select (Class 10 / U1, 32-64GB, FAT32) gives you the reliability that prevents failed prints without overpaying for V30/V60 speed you'll never use.

Detailed Specifications

Type
microSD (UHS-I)
Min Speed Class
Class 10 / U1
Write Speed
10 MB/s
Recommended Size
32GB, 64GB
Max Capacity
1TB (FAT32)

Top SD Card Recommendations

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SD Card Verified Speed Class Write Speed Pros Price
SanDisk Ultra microSD V10 SD card - 20USD
SanDisk Ultra microSD
 Full Review 		V10 Up to 20 MB/s
  • Cheap and sold in large capacities up to 1.5TB.
 $ Check Price
Samsung EVO Select (Blue) V30 SD card - 20USD
Samsung EVO Select (Blue)
 		V30 Up to 60 MB/s
  • Low price per GB with V30 and A2. 10-year limited warranty.
 $ Check Price
SanDisk Extreme microSD V30 SD card - 45USD
SanDisk Extreme microSD
 Full Review 		V30 Up to 130 MB/s
  • V30 and A2 with fast writes
  • sold up to 1.5TB. Widely available
  • so easy to buy genuine.
 $ Check Price

Compare These Cards

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See how the recommended cards for Bambu Lab P1S stack up side by side, or swap in any other card.

budget
SanDisk Ultra microSD

SanDisk Ultra microSD

 $ · Budget
  • UHS RatingUHS-I
  • Speed ClassV10
  • App PerformanceA1
  • Read SpeedUp to 195 MB/s
  • Write SpeedUp to 20 MB/s
  • EnduranceStandard
Available Capacities32GB, 64GB, 128GB, 256GB, 512GB, 1024GB, 1500GB

Pros

  • Cheap and sold in large capacities up to 1.5TB.

Cons

  • Not V30 rated. Too slow for most 4K video.
View on Amazon
budget
Samsung EVO Select (Blue)

Samsung EVO Select (Blue)

 $ · Budget
  • UHS RatingUHS-I
  • Speed ClassV30
  • App PerformanceA2
  • Read SpeedUp to 130 MB/s
  • Write SpeedUp to 60 MB/s
  • EnduranceStandard
Available Capacities64GB, 128GB, 256GB, 512GB

Pros

  • Low price per GB with V30 and A2. 10-year limited warranty.

Cons

  • Writes slower than the SanDisk Extreme.
View on Amazon
recommended
SanDisk Extreme microSD

SanDisk Extreme microSD

 $ · Mid-Range
  • UHS RatingUHS-I
  • Speed ClassV30
  • App PerformanceA2
  • Read SpeedUp to 190 MB/s
  • Write SpeedUp to 130 MB/s
  • EnduranceStandard
Available Capacities32GB, 64GB, 128GB, 256GB, 512GB, 1024GB, 1500GB

Pros

  • V30 and A2 with fast writes
  • sold up to 1.5TB. Widely available
  • so easy to buy genuine.

Cons

  • Write speeds are lower on the 32GB and 64GB versions.
View on Amazon

SanDisk Ultra microSD

The SanDisk Ultra microSD is a high-volume budget pick offering read speeds up to 195 MB/s for quick transfers and app loading. Its lighter write performance and V10 rating make it better suited to photos and everyday storage than sustained 4K video.

Target User: Budget-conscious smartphone and tablet users who want fast file transfers without 4K video demands
Best For: Smartphones & Tablets, Dash Cams, Drones

Upgrade to the SanDisk Extreme microSD if you need V30-rated write speeds for 4K video; stick with the Ultra for photos and casual use where price is the priority.

SanDisk Extreme microSD

The SanDisk Extreme microSD pairs V30 video speed with an A2 app rating and reads up to 190 MB/s. It covers 4K recording in drones and action cameras, game storage in handhelds, and app storage in phones. It is sold from 32GB to 1.5TB.

Target User: Smartphone, drone, and action camera users who want one reliable card for both 4K video and app storage
Best For: Action Cameras, Drones, Smartphones & Tablets, Mirrorless Cameras

Step up to the SanDisk Extreme PRO for higher sustained write speeds, or down to the Samsung EVO Select if 4K recording isn't a priority and price matters more.

Frequently Asked Questions

What SD Card Do I Need for Bambu Lab P1S?
The Bambu Lab P1S takes a microSD (UHS-I) card rated Class 10 / U1 or faster. 32GB or 64GB covers most owners, and the maximum is 1TB (FAT32). Buy SanDisk, Lexar, Samsung or Kingston from a reputable seller: counterfeit cards are the most common cause of lost files.
Is the P1S microSD card different from the X1-Carbon's?
No, both use the same microSD, FAT32 workflow. Any genuine Class 10 / U1 card that works in the X1-Carbon works identically in the P1S. The P1S lacks the X1C's lidar and some sensors; storage requirements are the same.
What's the best value microSD card for the P1S?
A genuine SanDisk Ultra or Samsung EVO Select in 32-64GB. The P1S is a value-tier printer, so there's no reason to buy an Extreme Pro or V60 card. The card never bottlenecks the print. Spend on a trustworthy brand, not raw speed.
My P1S won't read the SD card. What now?
Reseat the card, then reformat it as FAT32 (not exFAT) from a computer. If it still fails, the card is likely counterfeit or worn, so replace it with a name-brand card. Fake high-capacity cards bought cheaply online are the most common cause.
Is Class 10 / U1 required for Bambu Lab P1S?
Yes. Class 10 / U1 guarantees 10 MB/s of sustained write, which keeps the Bambu Lab P1S free of slow loads, stutter, or write errors. Faster cards work too.
What size SD card should I get for Bambu Lab P1S?
32GB covers light use; 64GB suits heavy use. The maximum is 1TB (FAT32).
Can I use older or slower cards with Bambu Lab P1S?
Not below Class 10 / U1. Slower cards cause slow loads, stutter, or write errors. Check the card label for the Class 10 / U1 mark.
Is a UHS-II card faster in Bambu Lab P1S?
No. The Bambu Lab P1S has a UHS-I slot, so a UHS-II card runs at UHS-I speed. It only offloads faster in a UHS-II card reader.
Does the brand matter for Bambu Lab P1S?
Yes. SanDisk, Lexar, Samsung and Kingston cards meet their rated speeds. Buy from the brand's store or a major retailer: counterfeit cards sold under those names are common on marketplaces.
What happens if I use the wrong card with Bambu Lab P1S?
A card slower than Class 10 / U1 causes slow loads, stutter, or write errors. A card over the maximum capacity or in the wrong format may not be recognized.
How long will an SD card last in Bambu Lab P1S?
Several years in normal use. Cards usually fail from wear or counterfeit flash, not age. Replace yours at the first write error, corrupted file or "card not recognized" message.

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