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Windows Service, file transfer, Windows 7

For the life of me I can't remember which windows service helps file transfer speeds within local folders or between drives on a local machine. I've goggle-fu'd and got nothing.. except Tera Copy. No. I'm not doing tera copy.. Anyone remember or know which service helps the transfer speeds?
 
I believe you're thinking of BITS (Background Intelligent Transfer Service). It's enabled by default and Windows Update depends on it if you're configured to automatically download and install updates on a schedule. Some users report improved local file transfer performance with BITS disabled, so you can certainly test that, but if you're experiencing poor file copy performance over your LAN try this first: run LAN Speed Test (Lite) v1.3 so you have an actual baseline on drive file transfer performance to compare with, after making any changes to Windows settings. LAN Speed Test is a simple tool that tests what really matters and that's how fast data actually gets transfered from point A to B on your local drives or LAN in real time. Now go to Control Panel > Programs and Features > click "Turn Windows features on or off" > uncheck "Remote Differential Compression" > click OK (this setting needs to be changed on each PC on your LAN). Reboot, then run LAN Speed Test again to compare results to your baseline figures.

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I believe you're thinking of BITS (Background Intelligent Transfer Service). It's enabled by default and Windows Update depends on it if you're configured to automatically download and install updates on a schedule. Some users report improved local file transfer performance with BITS disabled, so you can certainly test that, but if you're experiencing poor file copy performance over your LAN try this first: run LAN Speed Test (Lite) v1.3 so you have an actual baseline on drive file transfer performance to compare with, after making any changes to Windows settings. LAN Speed Test is a simple tool that tests what really matters and that's how fast data actually gets transfered from point A to B on your local drives or LAN in real time. Now go to Control Panel > Programs and Features > click "Turn Windows features on or off" > uncheck "Remote Differential Compression" > click OK (this setting needs to be changed on each PC on your LAN). Reboot, then run LAN Speed Test again to compare results to your baseline figures.

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Oh, I thought I was clear about drives being local. I'm NOT transferring files between Local computers I'm transferring files locally from one drive to another in the SAME pc not even over a local network; no networking involved at all... but you did mention Remote Differential Compression which i THINK was the thing I was trying to remember but it looks as though it relates to over a network
 
Disabling Remote Differential Compression improved drive to drive file transfer performance by about 2-3% on my machine, confirmed by LAN Speed Test which works great for testing file transfer performance between drives on a single machine. For example, with LAN Speed Test on my desktop, I create a new folder on the other drives (D:\Test, E:\Test, etc.) for it to write to and read from during the test, then run my baselines with a 1GB file size.

Poor file transfer performance between drives can be attributed to a number of different factors but I'd start by first running a baseline on each drive with CrystalDiskMark, followed by running CrystalDiskInfo on each drive to see if any SMART data indicates a possibly failing drive. Then I'd run a thorough malware/virus scan on all drives. If I got a clean bill of health from SMART, and no malware or viruses reported, I'd make sure my SSD/HDD firmware and storage controller drivers (like IRST) are all up to date. I'd also use LAN Speed Test and CrystalDiskMark, following any changes I made, to verify whether or not that change caused any improvement over my baseline figures.

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