The speed of sdxc(sd reader) is very slow.

B

binm

Bit poster
I am using MacBook M1 Max version. Under Mac, the speed of sd card (sdxc) can reach more than 70MB/s for both reading and writing. However, in the Windows 11 virtual machine, the sd card is recognized as a portable device instead of a disk, and the speed can only reach 6-10MB, which is much slower. What could be the reason? Is there any solution?

Here are screenshots of the smart card reader recognized in Windows and the speed test.
sb1.png sb2.png sb3.png sb4.png
 
binm said:
I am using MacBook M1 Max version. Under Mac, the speed of sd card (sdxc) can reach more than 70MB/s for both reading and writing. However, in the Windows 11 virtual machine, the sd card is recognized as a portable device instead of a disk, and the speed can only reach 6-10MB, which is much slower. What could be the reason? Is there any solution?

Here are screenshots of the smart card reader recognized in Windows and the speed test.
View attachment 21882 View attachment 21883 View attachment 21884 View attachment 21885
Click to expand...
Hello @binm,

Thank you for reaching out and apologise for the inconvenience.

we would suggest to re-install the Parallels tools manually by following steps:

1. Start your virtual machine
2. In the Mac Top menu, click on Actions > Reinstall Parallels Tools.

You may refer to this Knowledge Base for further guidance: https://kb.parallels.com/112609

If the issue persists, For further analysis, please perform the following steps:
1. Reproduce the issue.
2. Collect a technical report (click the Parallels icon on top of the mac menu bar > Help > Send technical data > check "Attach screenshots..." > press Send Report) and send the report's 9- ID in a reply to this message.

Thanks!
 
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