when i paste the copied file in my pendrive it starts copying with a high speed(60 mb/s) and completes 75% of file and the speed of copying gradually decreases and it reaches 9.1 mb/s and it takes more time to copy remaining 15% of file and it hangs at **0 seconds left ** and it never show file copied even i wait for a long time.
I doubt using an earlier version of Ubuntu would help too much as the same happens with Zorin 15, it's more likely to do with how exFAT and FAT32 volumes are handled. Here's a solution that works for me from github:
If you are running a x64 bit Ubuntu or other Linux and find USB transfers hang at the end apply this fix:
echo $((16*1024*1024)) > /proc/sys/vm/dirty_background_bytes echo $((48*1024*1024)) > /proc/sys/vm/dirty_bytes
I suggest you edit your
/etc/rc.local file to make this change persistant across reboots.
sudo nano /etc/rc.local
Go to the bottom of the file and leave a space then paste in those two lines.
Save the file with ctrl + x then press y.
To revert the changes enter this in console and remove the lines in
echo 0 > /proc/sys/vm/dirty_background_bytes echo 0 > /proc/sys/vm/dirty_bytes
More info and references: https://gist.github.com/2E0PGS/f63544f8abe69acc5caaa54f56efe52f https://unix.stackexchange.com/questions/107703/why-is-my-pc-freezing-while-im-copying-a-file-to-a-pendrive/107722#107722