Hello & thanks for your hard work! 
I noticed that when I download more photos at once, the process is slower than downloading them one by one. What I mean here is, that the AirDroid App builds a .zip file first which takes time + phone processing time + eats up a little battery (as of zipping) + if there's not enough space on the sd card, I wonder what would happen?
My suggestion would be to have the zip built with a zero % compression rate. OR ... let us choose that compression rate in the settings of the AirDroid App?
To back myself up a little, today I've downloaded two bunch of photos from my device:
1st 29 photos totalling 54.7 MB (zipped it's only 53.7 MB)
2nd 62 photos totalling 143.2 MB (zipped it's only 140.7 MB)
I am wondering if the zipping process makes any (significant) difference in the size of the downloaded file? .jpg is already compressed
Thanks for considering my request.

I noticed that when I download more photos at once, the process is slower than downloading them one by one. What I mean here is, that the AirDroid App builds a .zip file first which takes time + phone processing time + eats up a little battery (as of zipping) + if there's not enough space on the sd card, I wonder what would happen?

My suggestion would be to have the zip built with a zero % compression rate. OR ... let us choose that compression rate in the settings of the AirDroid App?
To back myself up a little, today I've downloaded two bunch of photos from my device:
1st 29 photos totalling 54.7 MB (zipped it's only 53.7 MB)
2nd 62 photos totalling 143.2 MB (zipped it's only 140.7 MB)
I am wondering if the zipping process makes any (significant) difference in the size of the downloaded file? .jpg is already compressed

Thanks for considering my request.