Slow download on second pc

I have an existing google drive account with a lot of pictures.
At the moment I am downloading all this (about 30GB) on a second pc. This download is very, very slow.
Some investigation shows that downloading is interrupted each time after about ten to fifteen pictures for a vew minutes.
The proces is just waiting doing nothing. Where is it waiting for. Is it the application, the network or is it google.
Does anyone has an idea and/or a solution ?
(This second pc is W8 connected to the internet with a fast fiber connection 100MB)

I have looking at the monitor and discovered that insync is using 100% of my harddisk. When pausing insync it drops down to 0%.
Why is insync using my harddisk so much all the time ? The synchronisation process doesn’t do anything, No files are downloaded at the moment. So what is it doing ?
I have send my log to your support email. Please take a look at it.

@ferryvanwezel I will forward your logs to our engineer and we will investigate what cause this issue. Our engineer will get back to you soon.

Thank you for your patience.