# SxS

> flash memory standard compliant to the Sony and SanDisk-created ExpressCard standard

**Wikidata**: [Q2300660](https://www.wikidata.org/wiki/Q2300660)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/SxS)  
**Source**: https://4ort.xyz/entity/sxs

## Summary  
SxS is a high-speed flash memory card standard developed by Sony and SanDisk, designed to comply with the ExpressCard interface and form factor. It is optimized for professional video and photography applications, offering fast data transfer rates and reliability. Introduced in 2007, SxS cards are used in devices like camcorders and provide a compact, high-performance storage solution.  

## Key Facts  
- **Developed by**: Sony and SanDisk.  
- **Compliant with**: ExpressCard standard (PCI Express interface).  
- **Introduced**: 2007.  
- **Primary use**: Professional video production and photography.  
- **Physical format**: ExpressCard/34 (34mm wide).  
- **Data transfer**: High-speed read/write via PCI Express.  
- **Aliases**: SxS Pro, SxS Pro ExpressCard.  
- **Compatibility**: Designed for use in devices with ExpressCard slots.  

## FAQs  
### Q: Who created the SxS standard?  
A: SxS was developed jointly by Sony and SanDisk.  

### Q: What is SxS used for?  
A: It is primarily used in professional video and photography equipment, such as camcorders, for high-speed data storage and transfer.  

### Q: How does SxS differ from other memory cards?  
A: Unlike SD or CompactFlash, SxS uses the ExpressCard form factor and PCI Express interface, enabling faster data transfer rates suited for demanding workflows.  

## Why It Matters  
SxS played a critical role in addressing the storage and speed demands of professional video production. By leveraging the ExpressCard standard and PCI Express technology, it provided a significant performance upgrade over older formats, reducing data transfer times and improving workflow efficiency. Its reliability and high capacity made it essential for applications like 4K video recording, where uninterrupted data writing is crucial. SxS also highlighted the collaboration between major industry players (Sony and SanDisk) to create standardized solutions for niche professional markets.  

## Notable For  
- First flash memory standard to utilize the ExpressCard form factor with PCI Express.  
- Optimized for high-bandwidth applications, such as 4K video recording.  
- SxS Pro variant offers enhanced durability and error correction for critical workflows.  
- Compatible with Sony’s professional camcorders and recording devices.  

## Body  
### Development and Introduction  
SxS was introduced in 2007 as a collaborative effort between Sony and SanDisk. It was designed to meet the growing demand for high-speed, high-capacity storage in professional video production, particularly with the advent of HD and later 4K recording.  

### Technical Specifications  
- **Interface**: PCI Express (via ExpressCard slot).  
- **Form Factor**: ExpressCard/34 (34mm wide, 54mm long, 5mm thick).  
- **Speed**: Supports sustained data rates up to 1.6 Gbps (varies by generation).  
- **Capacity**: Available in capacities ranging from 4GB to 1TB (as of later models).  

### Professional Applications  
SxS cards are engineered for use in demanding environments, such as broadcast television and cinema production. They are compatible with Sony’s XDCAM and HDCAM series camcorders, as well as other professional devices requiring rapid data transfer and reliable recording.  

### Evolution and Variants  
- **SxS Pro**: A higher-end variant with advanced error correction and ruggedized construction for extreme conditions.  
- **ExpressCard Compatibility**: While physically identical to ExpressCard/34, SxS cards require specific hardware support for optimal performance.  

### Legacy and Impact  
SxS helped establish PCI Express as a viable interface for professional storage solutions, influencing later card formats like CFexpress. Though largely supplanted by newer technologies in consumer markets, it remains a trusted standard in professional video workflows where reliability and speed are paramount.

## References

1. Freebase Data Dumps. 2013