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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?

  • I use FTP now all the time to transfer data between phone/PC – magicandre1981 Dec 25 '16 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 '17 at 2:56
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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:

  • Does the quote imply that copying without modification should work well? – Mikhail Feb 16 '17 at 1:03
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    work well ? yes! work fast ? no! "...which can take a long time for large objects" – apagando_tudo Feb 16 '17 at 12:43

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