Dear Sebastien Bacher, Yes< I was using the Disks app from the Control Center. I used gParted and solved the problem. Unfortunately I have had to reinstall Ubuntu 3 times since then, so additional data is not available. (Always keep you data in a separate partition from the Linux partition. Then when you have to reinstall Linux, your data stays intact.)
I am currently using the leading edge Ubuntu MATE 18.10 since I am disappointed in the LTS ever since I found that the bug with duplex- printing in LibreOffice for HP printers was reported over 5 YEARS ago and no one has ever been assigned to fix it. They were considering removing the bug since it is so old and has never been fixed. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-disk-utility in Ubuntu. https://bugs.launchpad.net/bugs/1797936 Title: Control Center->Disks cannot create ext4 partition on 5 TB external USB drive Status in gnome-disk-utility package in Ubuntu: Incomplete Bug description: I deleted the pre-existing NTFS and got a drive with all space unallocated. When I tried to create an ext4 partition, I got an error about the size of the partition. Closed Control Center->Disks and used gParted. No problem creating the ext4 partition. ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: gnome-disk-utility 3.28.3-0ubuntu1~18.04.1 ProcVersionSignature: Ubuntu 4.15.0-36.39-generic 4.15.18 Uname: Linux 4.15.0-36-generic x86_64 NonfreeKernelModules: ufsd ApportVersion: 2.20.9-0ubuntu7.4 Architecture: amd64 CurrentDesktop: MATE Date: Sat Oct 13 15:40:29 2018 ExecutablePath: /usr/bin/gnome-disks InstallationDate: Installed on 2018-07-06 (99 days ago) InstallationMedia: Ubuntu-MATE 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) ProcEnviron: XDG_RUNTIME_DIR=<set> SHELL=/bin/bash LANGUAGE=en_US PATH=(custom, no user) LANG=en_US.UTF-8 SourcePackage: gnome-disk-utility UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-disk-utility/+bug/1797936/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp