Quick Verdict
SanDisk Ultra vs Amazon Basics is a close call. Choose the SanDisk Ultra for faster listed read speeds (up to 140 MB/s) and a well-known brand. Choose the Amazon Basics card for U3 and A2 ratings and an included full-size adapter, which suit video and app use. Both are 128 GB microSDXC cards.
Check SanDisk Ultra price on Amazon
Check Amazon Basics price on Amazon
As an Amazon Associate I earn from qualifying purchases. This comparison is based on the manufacturer’s specifications and published retailer listings.
Table of Contents
SanDisk Ultra vs Amazon Basics: Specs Side by Side
| Feature | SanDisk 128GB Ultra | Amazon Basics 128GB |
| Capacity | 128 GB | 128 GB |
| Type | microSDXC, UHS-I | microSDXC |
| Read speed | Up to 140 MB/s | Up to 100 MB/s |
| Class | Class 10 | Class 10 |
| Video speed class | U1 | U3 |
| App performance class | A1 | A2 |
| Full-size adapter | Not listed | Included |
| Listed features | Water proof | Magnetic proof |
| Warranty | See the listing | 12 months, per the listing |
| Model | SDSQUAB-128G-GN6MN | LSMICRO128GU3 |
SanDisk Ultra vs Amazon Basics: Speed and Ratings
The SanDisk Ultra is listed with a higher maximum read speed, which helps when you copy large files off the card. The Amazon Basics card carries higher ratings on the speed classes that matter for use: U3 for sustained video recording and A2 for apps.
That means the faster-reading card on paper is not automatically the better pick for 4K video. If you shoot video, the U3 rating is the more useful number.
SanDisk Ultra vs Amazon Basics: Which Should You Buy?
Buy the SanDisk Ultra if you…
- move large files and want the fastest reads
- prefer a well-known memory-card brand
- use a phone, tablet, or Chromebook for everyday storage
Buy the Amazon Basics card if you…
- record video on a camera, drone, or action cam
- want the higher A2 app rating
- want an included full-size SD adapter
Read the Full Reviews
Final Verdict
For file transfers and brand familiarity, pick the SanDisk Ultra. For video recording and a higher app rating at a budget price, pick the Amazon Basics card.