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If I try to move a large amount of data, say 100GB, from my internal laptop SSD drive to my USB 3 SSD Seagate backup drive, the data rate runs very low (about 50KB/s) and it's calculated to take days. Is this because there are many files and moving a large file would be faster?

So I'm trying now to compress and move a zip file since it seems that moving large files is much faster that moving the same data size but with many small files. Can anyone tell me how this works?

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Without sounds like a cliche your speed is determined by the slowest link in the chain.

Transfer rates between drives can vary depending on their read/write speed. So you could find you have a USB 3 and a really fast external SSD, but a damaged USB port, slow cable or slow internal drive.

A good start would be to transfer a smaller file and see what result you get. If it runs the same then you need to have a look at your hardware setup. Try using a different USB cable and port is a good start.

See how that works out for you.

  • More info: Most laptops that support USB 3 have some USB ports that support USB 3 and more USB ports that don't. Use the blue port, or if you don't have a blue port use one with special markings. Also, USB 2 cables and USB 3 cables are different, USB 3 cables have extra pins and wires. – Peter Apr 15 '16 at 11:04
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You might check if you disabled the on-access scanning of the virusscanner. Otherwise it checks all the files you copy, and that slows down the process.

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