Is there anyone who has done the in-place upgrade from byzantium to crimson on the Librem 5 who can tell me what the actual size of the download is? (Doco says allow 8 GB disk space free but that doesn’t explicitly say how much needs to be downloaded, approximately.)
According to the output that I saved:
1352 upgraded, 368 newly installed, 14 to remove and 0 not upgraded.
Need to get 1,024 MB/1,025 MB of archives.
After this operation, 1,444 MB of additional disk space will be used.
Is that what you’re looking for?
I can post the full remove/upgrade/download/install output here if you want.
(I imagine I might have had various packages previously installed on my system that you don’t. 
I don’t know if that had an effect on my download from the new repos… included packages, etc.)
I performed the upgrade over ssh, if that’s relevant here.
And I don’t know if the package list has changed since I upgraded in early December 2025.
P.S. I did not use the new PureOS Upgrade package.
Yes. Thanks.
Yes, it will. I wasn’t after an exact number - because it will vary from user to user. I was just after a ballpark number so that I know whether I should leave the download running overnight or hang around for it to finish or somewhere in between.
Almost certainly things will have changed since then but hopefully not markedly.
To upgrade to Crimson, must I do everything,on this page Reflashing PureOS - Purism user documentation
or I only have to push on the button « upgrade to pureos 11 »??
Are you talking about Librem 5? If so, no, you don’t have to reflash. Reflashing is used when you want to wipe absolutely everything out and start again. If you just want to “push a button” then read this post: PureOS Crimson is released!!! and specifically
Existing Byzantium devices will automatically receive a PureOS Upgrade tool soon when installing system updates. New devices will begin shipping with PureOS Crimson pre-installed.
Byzantium users wishing to use this tool today can run:
sudo apt install pureos-upgrade
So, based on that, “push a button” would mean that you can’t quite do it yet, but “soon”.