hi, somtimes the installed size information is simply wrong.e $ pacman -Si thunderbird Repository : extra Name : thunderbird Version : 11.0-1 ...... Download Size : 15409.89 KiB Installed Size : 7968.00 KiB Architecture : x86_64 $ xz -l thunderbird-11.0-1-x86_64.pkg.tar.xz Strms Blocks Compressed Uncompressed Ratio Check Filename 1 1 15.0 MiB 40.0 MiB 0.376 CRC64 thunderbird-11.0-1-x86_64.pkg.tar.xz $ mkdir thunderbird && tar xf thunderbird-11.0-1-x86_64.pkg.tar.xz -C thunderbird && du -sh thunderbird tar: Ignoring unknown extended header keyword `SCHILY.fflags' 41M thunderbird the installed size should be around 40M while pacman and the package website show only about 8M. best regards,