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wirezen Author

Level 1

16 points

Incredibly slow transfer speed using exFAT

Hello everyone, i'm on macOS Ventura 13.0.1 and my iMac 27" (2019) have thunderbolt two port up to 40Gb/s.

I have bought an external USB SSD from Samsung (T7 Shield 2TB NVMe) that is recognised by macOS itself as a 10Gb/s device.

I NEED it to be formatted in exFAT, cause i do have to access files from different OS (Windows and Android), so please don't advice to format it in APFS.

Anyway, i'm seeing an incredibly slow transfer speed con this SSD, like 20 or more times slower than it should be (around 50MB/s or less instead of the "up to" 1GB/s attended).

It's slower than a normal 5400rpm hard drive formatted in HFS+.

This is why i'm here asking your help.

Any advice would be really appreciated.

Thanks

iMac 27″, macOS 13.0

Posted on Dec 3, 2022 12:06 AM

Top-ranking reply

wirezen Author

Level 1

16 points

Posted on Dec 4, 2022 12:24 AM

I've found several report around the web of this isse now and seems all about Ventura.

https://www.reddit.com/r/MacOSBeta/comments/wjdej8/slow_extern_ssd_write_speed_macos_ventura_beta_4/

https://forums.macrumors.com/threads/extremely-slow-external-ssds-and-hdds-on-macbook-pro-16-m1-max.2367355/

I hope Apple will recognize this issue and fix it in the next OS update.

Thanks everyone for the support.

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24 replies

Feb 21, 2023 8:34 AM in response to Labor_MJ

Yes, but the crux of the matter is, that Apples handling of ExFAT does not NEED to be that slow or even that buggy. That seems to be a recent feature on the Notebooks; at least until recently well known treat on iPads. "Nobody" uses iPhones in connection with media transfers; they're too abysmally slow.

How come, that Apple is (probably) the only digitally inclined company of any significance in the world, that cannot handle the most prevalent data exchange format in the world - ExFAT - in a safe and also speedy way? How come?

Regards