Hi,
Your files are probably compressed and warp decompresses them. You can
Compress them under the save as menu.
Nicolas Cadieux M.Sc.
Les Entreprises Archéotec inc. 
8548, rue Saint-Denis Montréal H2P 2H2
Téléphone: 514.381.5112  Fax: 514.381.4995
www.archeotec.ca
On Sep 2, 2015 10:28, "Johan Nilsson-2 [via OSGeo.org] "
<ml-node+s1560n5222318...@n6.nabble.com> wrote:
I have a Gtiff- file for about 10MB, but when I will assign projection
it grow to 135,2MB. I can not make any settings in
Raster->Projections->Assign projection (gdalwarp). It is a scanned dept
map, with only black and white lines and some text and I have saved with low
compession (Right click on the raster in Layer Panel -->Save as..Gtiff, VRT
unchecked) Will use the map on a mobilephone, and only small tiff are allowed.
/Cheers Johan Nilsson
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