M20 Magnetic SSD 2TB Portable SSD - Fast External Storage for 4K

In this review the M20 Magnetic SSD 2TB is judged as a portable drive aimed at mobile creators who need reliable external storage for high-resolution video and large photo archives. The single biggest reason to buy is its magnetic mounting and sustained transfer performance that lets compatible iPhone 15 Pro/16 Pro series record ProRes 4K directly to an external drive and move large files quickly to a Mac or PC. For anyone shooting ProRes video or needing a pocketable 2TB SSD, the M20 offers a practical blend of durability and speed.

Key Features

• Strong Magnetism: A built-in magnetic ring secures the drive to iPhone 15 Pro and 16 Pro series phones for convenient on-device recording and mounting.
• External High Capacity: Up to 2TB capacity provides plenty of headroom for long video shoots and large photo libraries without relying on phone storage.
• Super Fast Transfers: Max transfer rates support recording ProRes 4K 60Hz (15 Pro series) or 4K 120Hz (16 Pro series) and near-1000MB/s transfers to a Mac for quick editing workflow.
• Durable Build: Zinc alloy and ABS shell delivers a premium feel and a tighter structure to resist dust and light falls during travel.
• Compact and Portable: Smaller and lighter than a phone, it tucks into a pocket or bag for on-location shoots without added bulk.
• Wide Compatibility: Works over USB-C with varying speeds depending on host support, from USB2.0 up to USB3.2 Gen2x2 or Thunderbolt connections.

Who It's For

The M20 is best for mobile photographers and videographers using iPhone 15 Pro, 15 Pro Max, 16 Pro or 16 Pro Max who record in ProRes RAW/Log or high-frame-rate ProRes formats and want direct external recording or fast offloads. It is also a good fit for Mac and PC users who need a compact, high-capacity portable SSD with robust build quality and magnetic mounting for phone-based workflows.

It is not the right choice for owners of iPhone 14 and earlier if their goal is external ProRes recording, since those models do not support recording ProRes 4K to external SSDs. Users of older phones will only get basic photo and file backup functionality and may need a C-L adapter for some Android devices.

Pros & Cons

Pros

• Magnetic mounting works well with compatible iPhones and with the supplied adhesive iron ring for many phone cases.
• High capacity 2TB option removes storage anxiety during long shoots.
• Strong sustained transfer speeds speed up editing workflows when connected to a Mac or USB4 host.
• Rugged zinc alloy shell feels durable and travel-ready.

Cons

• Only USB-C interface; older phones and some devices need adapters or will be limited to backup functions.
• Models 14 and below do not support external ProRes 4K recording, limiting full functionality to newer phones.

Specifications

Capacity	2TB
Interface	USB-C (USB3.2 Gen2x2 / USB4 / Thunderbolt compatible)
Max transfer speed	Up to 2000MB/s (20Gbps over Gen2x2; lower on older hosts)
Compatibility	Compatible with iPhone 15 Pro/15 Pro Max/16 Pro/16 Pro Max for ProRes recording; Mac, PC, some Android devices for backup
Build	Zinc alloy and ABS shell
Mounting	Built-in magnetic ring plus extra adhesive iron ring

Our Verdict

The M20 Magnetic SSD 2TB is a practical, well-built option for creators who use recent iPhone Pro models and need on-device recording or fast offloads to a Mac or PC. Its magnetic convenience, solid construction and high capacity make it a strong value for mobile workflows, though owners of older phones should expect reduced functionality and may need adapters for basic backups.

Frequently Asked Questions

Will this record ProRes from my phone?
Yes for iPhone 15 Pro/15 Pro Max and 16 Pro/16 Pro Max for supported ProRes modes; models 14 and below do not support ProRes 4K recording to external SSDs.

Do I need adapters for other phones?
Some older iPhones and high-end Android phones require a C-L data adapter or the supplied adhesive iron ring to connect and access photo/file backup features.

How fast are transfers to a computer?
Transfer speeds depend on host port: up to Gen2x2 20Gbps potential and near 1000MB/s observed in many Mac workflows, lower on USB3.0 or USB2.0 hosts.