you need to check what process is using 100% in Task Manager under Disk column

is your storejet comes with y cable? do u plug in both data & power to your lappy

the problem is nothing there. while on the performance tab can see the external drive shoots up to 100% out of nothing. lol

no Y cable. it comes with one big ass usb3 SS cable with single USB plug.

1. Cable - check your cable connection properly.

2. Damaged Hard Disk - maybe your hard disk got damaged.

does the 100% happen in other PC's/laptops?

MAKE SURE YOUR EXTERNAL HDD PLUG INTO

USB 2.0

OR BETTER USB 3.0

USB 1.0 SPEED TOO SLOW...

Use PotPlayer
it from Korean developer.

The best player to date
Download english version from this website
http://www.videohelp.com/tools/PotPlayer

bro...no offence, but you need to get your eye sight checked. I have stated through USB 3.0 and i am not a total noob in PC stuff. I know what is blue socket SS (superspeed) for on my laptop, and it is a freaking core i7 with 2 blue USB 3.0 ports with latest drivers + windows 8.1 64bit, latest klite codec packs with media player classic, GT750M with latest drivers latest directX 11 and boosted playback with DXVA (CUVID). and if that laptop still comes with USB 1.0, i musta been crazy to buy a gaming laptop with stoneage ports.

Please do not ask me to check my cable again. thanks for the tips, but as I said, not a total noob here. I know if the connection is bad and hard disk damaged or not. And i have already swapped another USB3.0 cable for testing. It is a new HDD few weeks old, rarely traveled with it and i have done defragging, formatted NTFS, ran a chkdsk, no error no problem no abnormality in file transfers, freaking usb3.0 speeds with 90mb/s for single large files.

tried with mcafee real time scanning off too still stutters some time into the movie (intermittent, 3-5 times within a full length movie, continues playback normal after disk active time dropped from 100% to normal rate of 0-6%). power settings USB selective has turned to off. Now i try to look into windows 8 superfetch to see if it cures the problem and i will test run the movie on the same HDD on another new lappie with lower specs. movie seems to play no problem thru a 500GB portable HDD with USB3.0 so i guess maybe the codecs are not the issue here. although after tested with VLC (havent tested with others) the stutter seems to have reduced.

and thanks a lot for those who helped, more inputs are still welcomed..... maybe a tiny fix i have overlooked somewhere.

update: testing on other lappie running windows 8 64bit also having stuttering issue, with the same latest k-lite codec packs.

followup tests: play movie in high performance power plan.

I know this is a very late reply but anyway: i am suffering from the same bug apparently for my 4 HDD USB 3.0 bay. Sometimes can move 5 Gb without issue, sometimes its a rollercoaster. annoying issue.

tried the USB selective power management (offed it), ensured the power management doesnt allow to ports to power the device down and placed the correct DeviceHackFlag (400) in the reg for the HUB (Archgon MH-3642JSC). Sometimes can run a whole day or more, sometimes it hits me every few minutes.

Is there anything I can do? I can confirm that active disk time shoots to 100% but in taskmanager i cant see any app that is using a lot of the disk. How to trouble shoot this? The external disk is pure media storage and no virus scanner/indexer etc. runs on the disk. Only serviio hits it every 4 hrs (which is not the case when the problem occurs).

Any suggestions would be much appreciated!

My windows 8.1 64 bit is fully updated so i am not sure what else I can do. Only thing I noticed is that the bay runs on an old driver (seems correct though): USBSTOR.SYS Version: 6.3.9600.16384 (winblue_rtm.130821-1623) from 2006? (edit: time stamp is Aug 2014)

This post has been edited by PJusa: Jan 8 2015, 10:08 AM

Could you try the harddisk in another PC?

Try the storejet ext HDD on Win 7 PC. Could be a Win 8/8.1 bug. No fix for this bug yet.