The problem was your install media was corrupted, ie. either an incorrect ISO was downloaded (md5sum or sda256sum wasn't performed to check it's integrity), or the write to install media failed (thus it wrote a corrupted or incorrect data) or the device was faulty and thus didn't store the correct data on it.
The media you are installing to was not the problem, your installation media where used to 'boot' was invalid which would have been detected with this step (https://help.ubuntu.com/community/Installation/CDIntegrityCheck where CD is whatever installation media you use, be it hdd/ssd/thumb-drive/dvd or CD). The prior (ISO) checksum step ensures the CDIntegrityCheck step is valid & not giving false-reports, but in my experience it's the write to media that usually fails (esp. on thumb-drives). -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1861537 Title: installer crashes when it is "creating partitions" or "calculating files to skip copying" To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubiquity/+bug/1861537/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
