will this work with my surface pro 6?

i don't see an issue why it wouldn't. i have bought a few Sandisk in the past for my surface with no issue. this is the best brand to purchase and i'm loving my 400gb as it gives me more storage for what i need to so my work.

Will this micro sd work for a nintendo switch? want to purchase but not to sure if it's compatible

If it can take a micro sd card, this should work, there is little to no imcompatible SD card issues anywhere, the only issue is will the nintendo support 400gb, if it doesn't it will only support its max, example if nitendo only supports 320gb and you put in a 500gb, you can only access the 320gb on the card.

Is it possible to clone my Mac HD to this and run the OS?

Never Tried. Use in S8+ for all files, music, photos..

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SanDisk 400GB Ultra microSDXC A1 UHS-I/U1 Class 10 Memory Card with Adapter, Speed Up to 100MB/s (SDSQUAR-400G-GN6MA)

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Capacity: 400GB

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Class 10 for Full HD video recording and playback
Transfer speeds of up to 100MB/s
Load apps faster with A1-rated performance
Ideal for Android smartphones and tablets, and MIL cameras

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SanDisk Ultra 400 GB Class 10/UHS-I microSDXC - 100 MB/s Read - 667x Memory Speed - 10 Year Warranty

Model
Brand	SanDisk
Series	Ultra
Model	SDSQUAR-400G-GN6MA
Type	microSDXC

Details
Capacity	400GB
Speed Class Rating	UHS-I / U1 / Class 10 / A1
Read Speed	Up to 100MB/s

Features
Features	Capture and Store Even More Hours of Full HD Video With a breakthrough capacity of up to 400GB, you can store even more hours of Full HD video on the card without worrying about running out of room for the videos, photos, music, movies and other files you want to shoot, save and share. Transfer Speeds of up to 100MB/s Blazing transfer speeds mean that your content moves fast letting you move up to 1200 photos in a minute. Load Apps Faster with A1-rated performance Rated A1, the SanDisk Ultra microSD card is optimized for apps, delivering faster app launch and performance that provides a better smartphone experience. Full HD Video Capture Class 10 speed rating allows you to shoot Full HD video and high quality photos. Ideal for Android Smartphones and Tablets SanDisk cards are compatible with Android smartphones and tablets. SanDisk Memory Zone App for Easy File Management Available from the Google Play store, the SanDisk Memory Zone app lets you view, access, and back up your phone's files in one location. It can also automatically move files from your device to your memory card to free up space.

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First Listed on Newegg	March 13, 2026

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SanDisk 400GB Ultra microSDXC A1 UHS-I/U1 Class 10 Memory Card with Adapter, Speed Up to 100MB/s (SDSQUAR-400G-GN6MA)

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Item#: 9SIBEC2KTT9201

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SanDisk 400GB Ultra microSDXC A1 UHS-I/U1 Class 10 Memory Card with Adapter, Speed Up to 100MB/s (SDSQUAR-400G-GN6MA)

Learn more about the SanDisk SDSQUAR-400G-GN6MA

Customer Reviews of the SanDisk SDSQUAR-400G-GN6MA

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

Return Policies

Manufacturer Contact Info