Hello,
I have a qcow2 image file with these details with "qemu-img info" command:

file format: qcow2
virtual size: 66G (70866960384 bytes)
disk size: 1.5G
cluster_size: 65536
Format specific information:
    compat: 0.10

I'm on 4.2.6 and If I try to upload as a disk from the GUI it seems it tries to upload full 66Gb, not 1.5Gb...
And it goes paused after the probably transferred 1.5Gb...
Also, I would like it to be qcow2 1.1 and not 0.10
I have run:

qemu-img convert -O qcow2 -o compat=1.1 source.qc2 source.qc2_v3

and now I have
file format: qcow2
virtual size: 66G (70866960384 bytes)
disk size: 4.2G
cluster_size: 65536
Format specific information:
    compat: 1.1
    lazy refcounts: false
    refcount bits: 16
    corrupt: false

Is it expected to pass from 1.5Gb to 4.2Gb after conversion?

Anyway also in 1.1 format, if I try to upload It keeps sending the whole 66Gb and now it goes in paused after about 1 minute (at rate of 60MB/s) that lets me think that once arrived at the 4.2Gb size it has problems...

Any hint?

Thanks,
Gianluca