Lexar Muse portable SSD enables 4K 120fps ProRes recording on iPhone

The introduction of the Lexar Muse portable SSD addresses a critical bottleneck in mobile cinematography by offloading high-bitrate ProRes files to external storage without compromising the iPhone's form factor. By achieving 1,000 MB/s write speeds in a 1mm-thick enclosure, Lexar is positioning mobile devices as viable primary cameras for professional 4K 120fps production. This shift reduces the hardware footprint for field reporters and independent creators who previously relied on bulky external rigs. As mobile platforms increasingly adopt professional codecs, the industry should monitor whether proprietary connectors like PogoPin gain wider adoption over standard USB-C for specialized video peripherals.

The Lexar Muse portable SSD arrives amid intensifying competition in external storage for mobile video production. In September 2024, Apple expanded ProRes Log recording to the iPhone 16 Pro lineup, which increased file sizes substantially and created demand for faster external drives. Samsung responded with the T9 portable SSD, rated at 2,000 MB/s sequential reads, while SanDisk's Extreme Pro Portable SSD v2 has become a staple among mobile filmmakers using Blackmagic Camera and Filmic Pro apps. Lexar differentiates the Muse by prioritizing MagSafe integration and a proprietary PogoPin connector rather than competing on raw throughput alone, targeting creators who value minimal rig weight over maximum bandwidth.

On the business side, Lexar's parent company Longsys reported revenue growth of over 30% year-over-year in its 2025 fiscal results, driven in part by its expansion into professional content-creation storage. The company has been pushing into the creator economy segment since acquiring the Lexar brand from Micron in 2018, and the Muse represents its most aggressive move into the Apple ecosystem. Apple's decision to require external storage for ProRes 4K 120fps recording on iPhones, rather than relying solely on internal capacity, has opened a peripheral market that Lexar, Samsung, and SanDisk are all courting. The proprietary PogoPin approach carries risk, however, since it locks users into Lexar's cable ecosystem rather than leveraging the universal USB-C standard that Apple adopted across its lineup starting with the iPhone 15.

From a technical standpoint, the Lexar Muse's 1,000 MB/s write speed sits below the theoretical ceiling needed for sustained 4K 120fps ProRes recording, which can demand sustained writes approaching 1,400 MB/s at the highest quality settings. Nokia and AWS demonstrated that cloud-hosted network functions can maintain sub-millisecond latency for real-time workloads, a principle that applies to storage pipelines as well: any bottleneck between sensor and storage introduces dropped frames. In practice, Apple's ProRes implementation on iPhone uses variable bitrate encoding that typically peaks below 1,000 MB/s for 4K 120fps, meaning the Muse should handle most real-world recording scenarios without frame drops. Independent testing by mobile cinematographers will be critical to confirm whether the PogoPin connection maintains consistent throughput under sustained thermal load, a known challenge for ultra-thin SSD enclosures that lack active cooling.