[issue]:

[AfaafaBe]

Official FAQ

• I have checked the official FAQ.

Ventoy Version

1.0.99

What about latest release

Yes. I have tried the latest release, but the bug still exist.

Try alternative boot mode

Yes. I have tried them, but the bug still exist.

BIOS Mode

Both

Partition Style

GPT

Disk Capacity

32GB

Disk Manufacturer

Kingston

Image file checksum (if applicable)

Yes.

Image file download link (if applicable)

https://www.ventoy.net/en/download.html

What happened?

After creating a Ventoy bootable USB drive with version 1.0.99, I experienced a significant drop in file transfer performance. Before using Ventoy, the USB drive's transfer speed was approximately 120 MB/s. After installing Ventoy, the speed dropped to 40 MB/s during file copies.

This issue is consistent across multiple devices and occurs even after reformatting and recreating the Ventoy USB stick.

Steps to reproduce the issue:
Format a USB drive (64 GB, MBR, Legacy BIOS).
Install Ventoy version 1.0.99 on the USB drive.
Copy a large file (e.g., 1 GB) to the USB drive.
Observe the reduced transfer speed (40 MB/s instead of 120 MB/s).
What I expected:
File transfer speeds to remain consistent with the USB drive's original performance (around 120 MB/s).

What I observed:
File transfer speeds are significantly reduced after installing Ventoy.

[steve6375]

File transfer performance will depend on the file system that was used to format the USB drive.
By default Ventoy will use exFAT. What was the filesystem type BEFORE you installed Ventoy?

[AfaafaBe]

I have already to formate on ntfs. Le jeu. 16 janv. 2025 à 11:50, Steve Si ***@***.***> a écrit :

…

File transfer performance will depend on the file system that was used to format the USB drive. By default Ventoy will use exFAT. What was the filesystem type BEFORE you installed Ventoy? — Reply to this email directly, view it on GitHub <#3086 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AZ3AVNRIT3A6JVOHSHHIIDL2K5XGPAVCNFSM6AAAAABVIY5ERGVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDKOJUHEYDQNZXGQ> . You are receiving this because you authored the thread.Message ID: ***@***.***>