Transcend TS128GUSD300S-A 128GB 300S microSDXC Card - Class 10/UHS-I - U3 - 95 MB/s Read - 45 MB/s Write
Business volume discounts
Technical guidance
Preparation & staging
QC · ON · AB · BC
Product Features
Technical Overview
This Transcend microSDXC card combines substantial storage capacity with optimized speed performance for mobile computing environments. The 128GB capacity uses the microSDXC format, which supports larger storage volumes than standard microSD cards while maintaining backward compatibility with microSDHC slots through proper formatting.
The card's 95 MB/s maximum read speed enables quick file transfers and application loading, while the 45 MB/s write speed ensures smooth recording of high-definition video content. The Class 10/UHS-I (U3) rating guarantees minimum sustained write performance of 30 MB/s, making it suitable for continuous HD video capture without dropped frames.
Relevant factors for this section include Storage Capacity, Maximum Read Speed, Maximum Write Speed, Width. When those points are considered together, they give buyers a clearer picture of how the product is equipped, how it fits into deployment, and what kind of day-to-day role it is meant to support.
Key Product Advantages
Transcend's 300S series microSDXC card balances capacity, speed, and reliability for everyday mobile storage needs. The combination of substantial storage space and consistent performance makes this card a practical choice for expanding device storage without compromising on speed.
Optimized for Mobile Use
The compact microSDXC form factor fits smartphones, tablets, and action cameras while delivering desktop-class storage capacity. The card's performance profile matches the requirements of modern mobile applications and media recording.
- Compact 15mm x 11mm x 1mm dimensions
- Lightweight 400mg construction
- Compatible with microSDHC and microSDXC slots
Reliable Performance
With Class 10/UHS-I (U3) certification, this card maintains consistent write speeds during continuous recording sessions. The performance specifications ensure smooth operation for photography, videography, and application storage.
- Minimum 30 MB/s sustained write speed
- 95 MB/s peak read performance
- Suitable for 1080p HD video recording
Deployment / Use Cases
This Transcend microSDXC card serves as expandable storage for a wide range of mobile and portable devices. The 128GB capacity and Class 10/UHS-I (U3) performance make it particularly well-suited for media-intensive applications where both storage space and consistent write speeds are important.
Primary deployment scenarios include smartphone storage expansion for photos, videos, and applications; action camera recording for outdoor activities and sports; tablet storage for educational content, media libraries, and productivity applications; and portable gaming device storage for game libraries and saved data.
Action Camera Recording
The card's 45 MB/s write speed and Class 10/UHS-I (U3) rating support continuous 1080p HD video recording without interruption. This makes it suitable for dash cams, sports cameras, and security applications where reliable recording is essential.
Mobile Device Expansion
With 128GB of additional storage, users can expand their smartphone or tablet capacity for apps, photos, music, and documents. The card's performance ensures smooth operation of applications and quick access to stored content.
Physical Profile
Measuring just 0.59 inches (15 mm) in length, 0.43 inches (11 mm) in width, and 39.37 mil (1 mm) in thickness, this microSDXC card maintains the standard compact dimensions expected for mobile storage solutions. The lightweight 400mg construction ensures minimal impact on device portability while providing substantial storage expansion.
The physical profile is practical for deployment planning because the dimensions and weight are clearly defined: 0.43" (11 mm), 400 mg. This helps confirm rack, shelf, desk, or cabinet fit before installation.
- Width
- 0.43" (11 mm)
- Weight
- 400 mg
- Length
- 0.59" (15 mm)
Highlights
- 128GB microSDXC storage capacity for extensive media and application storage
- 95 MB/s maximum read speed for quick file access and transfer
- 45 MB/s maximum write speed for smooth HD video recording
- Class 10/UHS-I (U3) speed rating ensures minimum 30 MB/s sustained write performance
- Compact dimensions: 0.59" L x 0.43" W x 39.37 mil T (15mm x 11mm x 1mm)
- Lightweight 400mg construction for minimal impact on device portability
- Suitable for 1080p full HD video recording without dropped frames
- Compatible with devices supporting microSDHC and microSDXC formats
- Manufactured in Taiwan with Transcend's quality standards
Specifications
| Specifications | |
|---|---|
| Manufacturer | Transcend Information, Inc |
| Manufacturer Part Number | TS128GUSD300S-A |
| Brand Name | Transcend |
| Product Series | 300S |
| Product Name | 128GB 300S microSDXC Card |
| Product Type | microSDXC |
| Technical Information | |
| Storage Capacity | 128 GB |
| Maximum Read Speed | 95 MB/s |
| Maximum Write Speed | 45 MB/s |
| Speed Class Rating | Class 10/UHS-I (U3) |
| Physical Characteristics | |
| Width | 0.43" (11 mm) |
| Thickness | 39.37 mil (1 mm) |
| Length | 0.59" (15 mm) |
| Weight (Approximate) | 400 mg |
| Miscellaneous | |
| Country of Origin | Taiwan |
FAQ
What devices are compatible with this Transcend microSDXC card?
This Transcend TS128GUSD300S-A 128GB microSDXC card is compatible with any device that supports microSDXC or microSDHC cards, including smartphones, tablets, action cameras, dash cams, portable gaming consoles, and laptops with microSD card readers. The card uses the standard microSDXC format and requires devices that support exFAT formatting for capacities over 32GB. Most modern Android smartphones, tablets, and cameras manufactured after 2010 support microSDXC cards, though you should verify your specific device's compatibility before purchase.
What is the difference between Class 10 and UHS-I U3 speed ratings?
Class 10 represents a minimum sustained write speed of 10 MB/s, while UHS-I U3 represents a minimum sustained write speed of 30 MB/s. This Transcend card carries both ratings, meaning it meets the higher U3 standard of 30 MB/s minimum sustained write performance. The UHS-I (Ultra High Speed Phase I) interface provides faster bus speeds than standard SD cards, and the U3 rating specifically indicates suitability for 4K video recording, though this card's 45 MB/s write speed makes it optimized for 1080p HD video rather than 4K.
Can this card handle continuous video recording for security or action cameras?
Yes, the Transcend 128GB microSDXC card with Class 10/UHS-I (U3) rating is designed for continuous video recording applications. The 45 MB/s write speed and U3 rating ensure minimum sustained write performance of 30 MB/s, which is sufficient for 1080p HD video recording without dropped frames or interruptions. The 128GB capacity provides approximately 16-24 hours of 1080p recording time depending on compression settings, making it suitable for dash cams, security cameras, and action cameras that require reliable continuous recording.
How does the 95 MB/s read speed benefit everyday use?
The 95 MB/s maximum read speed enables faster application loading, quicker photo browsing, and reduced transfer times when moving files between devices. For smartphone users, this means apps stored on the card will launch more quickly, and photo galleries will scroll smoothly. When transferring files to a computer via a card reader, the higher read speed reduces wait times for large file transfers. This performance level is particularly noticeable when working with high-resolution photos, large application files, or when backing up device content to other storage media.
What is the actual usable storage capacity after formatting?
After formatting, the usable storage capacity will be slightly less than 128GB due to the file system overhead and manufacturing measurement conventions. Typically, a 128GB microSDXC card provides approximately 119-122GB of usable space after exFAT formatting. This reduction occurs because storage manufacturers use decimal measurements (1GB = 1,000,000,000 bytes) while operating systems use binary measurements (1GB = 1,073,741,824 bytes), plus the file system itself requires some space for allocation tables and metadata. The exact usable capacity may vary slightly based on formatting options and cluster size settings.
Is this card suitable for use in Nintendo Switch or other gaming consoles?
Yes, this Transcend 128GB microSDXC card is suitable for the Nintendo Switch and other portable gaming consoles that support microSDXC cards. The 95 MB/s read speed supports quick game loading, while the 128GB capacity provides substantial space for game downloads, updates, and saved data. For Nintendo Switch specifically, the console supports microSD, microSDHC, and microSDXC cards up to 2TB in capacity, and this card's performance exceeds the Switch's requirements for smooth gameplay and loading. The card should be formatted by the console itself when first inserted to ensure optimal compatibility.
| Qty | Price | Available |
|---|
