BASEQI UHS-II Aluminum microSD Adapter for 2021 MacBook Pro M1

In this review the BASEQI UHS-II Aluminum microSD Adapter is judged as a practical, low-profile way to add removable storage to the 2021 M1 MacBook Pro 14' and 16'. The single biggest reason to consider it is simple: it tucks completely inside the laptop and provides up to 2TB of extra disk space when paired with a compatible microSD card, letting users extend storage without carrying dongles or changing internal drives. For users who need extra, stealthy space and compatibility with Time Machine, this adapter makes that possible with minimal fuss.

Key Features

• Hidden fit: The adapter is machined from aluminum to sit 100% within the MacBook chassis so there is no awkward protrusion when installed.
• Expandable capacity: Accepts microSD cards up to the SD spec limit so users can add as much as 2TB of portable storage to their MacBook.
• UHS-II support: Works with both UHS-II and UHS-I microSD cards, allowing owners to choose cards that match their performance needs.
• Time Machine compatible: Can be used as a target for MacBook Time Machine backups when formatted appropriately in macOS.
• Simple installation: The adapter is easy to insert and stays snugly seated to act as a semi-permanent expansion option for everyday use.

Who It's For

This adapter is well suited to MacBook Pro 14' and 16' owners who routinely need extra, removable storage without carrying external drives or a USB hub. Photographers, video editors who work with proxy files, and users who need a compact Time Machine target will appreciate the stealth and convenience of added capacity that sits flush with the chassis.

It is less appropriate for users who require the fastest possible sustained transfer rates for high-bitrate video work, since actual speeds depend on the microSD card used and some customers report modest transfer performance. Also, if you frequently swap cards and need an easy eject every time, the fit can be snug and extraction varies between units.

Pros & Cons

Pros

• Flush, unobtrusive installation preserves the MacBook profile and avoids dongles.
• Supports large microSD cards for up to 2TB of additional storage capacity.
• Compatibility with both UHS-II and UHS-I cards gives flexibility in choosing speed vs cost.
• Can be used with macOS Time Machine for simple local backups.

Cons

• Transfer speeds are limited by the chosen microSD card and some users report slower-than-expected performance.
• Removal experience varies; some customers find it hard to extract the adapter from the slot.

Specifications

Product type	Aluminum microSD adapter for MacBook
Compatible models	2021 MacBook Pro 14' and 16' (Model Identifier MacBookPro18,3 noted)
Card standards supported	UHS-II and UHS-I microSD cards
Maximum supported card capacity	Up to 2TB (SD spec)
Material	Aluminum
Use cases	Extra storage, Time Machine target, removable expansion

Our Verdict

The BASEQI UHS-II Aluminum microSD Adapter is a smart, value-conscious option for 2021 MacBook Pro users who want stealthy, removable expansion without external drives. It delivers real convenience and broad compatibility with UHS-II and UHS-I cards, though buyers should select a high-quality microSD card if transfer speed matters and be prepared for a firm, sometimes tricky, fit when removing the adapter.

Frequently Asked Questions

Will this adapter work with Time Machine?
Yes. When formatted correctly in macOS the adapter plus an inserted microSD card can be used as a Time Machine backup destination.

Does it stick out of the MacBook when installed?
No. The adapter is designed to sit fully inside the 2021 MacBook Pro chassis so it remains flush and unobtrusive.

Are speeds fast enough for video editing?
Speeds depend on the microSD card; UHS-II cards will offer the best performance but some users report transfer speed limits compared with internal SSDs.