B450 USB SPEED SLOW OR IRREGULAR - SOMETIMES SLOW, SOMETIMES FAST?

Have "Lenovo B450" for about 12 months.  Recently connect 2 drives 2 external t via USB.

When I transfer files between them, using a synchronization program or other programs - transfer speed is very erratic.  Sometimes runs at 18 + MB per second, then the next transfer (hasn't stopped program) will quickly slow down less than 2 Mbps?  Performance is random?

I am running XP SP3 Professional.

The same configuration (and OS) with my desktop PC is constantly fast USB (18 MB/s) transfers between disks?

Latest lenovo drivers installed.  It seems to be a BIOS problem - please test this on your B450 - Lenovo, please test.

All solutions?

I tried all the solutions for slow usb noticed on the web.

Thank you

Ray

SOLVED!  or rather a workaround solution was suggested by LENOVO TECH SUPPORT - a brilliant idea - run in safe MODE, make the file transfers according to normal - I found that speed was always faster to about 25 MB/s using the same synchronization program.

It seems that some process running in normal mode interferes with USB file transfer speeds.  Could be antivirus, checking files on the fly or something else - weird * beep * huh - Anyhoo, I'll do the transfer of large files in safe mode in the future.  Thanks Lenovo support!

see you soon,

Ray

Tags: Lenovo Notebooks

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