Internal disc speed on M1 Max studio numbers are off. Did I do it wrong?

[n8mac]

I tested my external Samsung 4TB 990 nvme and got this...

I guess that's about right as it's in a cheaper enclosure. When I went to test the internal I was told I didn't have permission to write, so I created a 8gb disc image on the internal and tested that. Results look just a bit off...

 

[Bigwaff]

When I went to test the internal I was told I didn't have permission to write, so I created a 8gb disc image on the internal and tested that.

Did you give BM app Full Disk Access in Settings > Privacy & Security ?

 

[n8mac]

I added that and still no change. Not too worried about it.

 

[MacCheetah3]

When I went to test the internal I was told I didn't have permission to write,

Is the target one of your user account folders (e.g., Desktop, Documents)? You won’t be able to write to the root of the drive or most of the directories outside of your user account (even with full disk access).