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Since Android phones are no longer mounted as an external drive I'm having an issue with a copying of large amount of photos from the phone (no matter what - LG G3, Galaxy S7) to the laptop (Windows 10).

It starts at pretty good speed - I can see file name changing 3-4 times per second in the copying dialog - and then getting slower and slower till the moment when single file name could be displayed for up to 10 sec.

I would probably just live with it but I found that laptop's performance degrades as well during this process as copying brings 99% disk utilization while transfer speed is far below the maximum for the SSD:

99% Disk utilization with transfer speed of 1.4MB/s

How to track down and fix the reason it is happening?

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  • I use FTP now all the time to transfer data between phone/PC Dec 25, 2016 at 10:35
  • I saw this since you are using android, claims there are less problems using MTP: play.google.com/store/apps/… Haven't tried it myself though, gl.
    – Musselman
    Feb 13, 2017 at 2:56

1 Answer 1

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Based on this answer:

This is a problem in communication's protocol:

The MTP and PTP standards do not support direct modification of objects. Modified objects must be copied out of the device and reuploaded in their entirety, which can take a long time for large objects

And Based on this article:

It suggests to use ADB to transfer files, but in Linux not Windows 10.

To use ADB on Windows, follow this:

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  • Does the quote imply that copying without modification should work well?
    – Mikhail
    Feb 16, 2017 at 1:03
  • 4
    work well ? yes! work fast ? no! "...which can take a long time for large objects" Feb 16, 2017 at 12:43

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