One of my partition is showing up this error when opening. I removed windows today and installed Ubuntu in the 128GB SSD. After starting Ubuntu, I am not able to open my secondary HDD partition. I tried so many ways to fix it, many commands, still no luck. Can someone help me with this please? I have attached the screenshot of the error.
I have removed Windows, so going to Windows and turning off fast boot is not an option for me, like suggested in many threads online.
Your partition was not cleanly unmounted the last time it was used. Unfortunately, because it's NTFS, this problem cannot be fixed within Ubuntu; you must fix it from Windows. You can (temporarily) move the disk to a Windows computer, use a Windows emergency repair disk, or re-install Windows on the disk to fix the problem.
Once the problem is fixed, if you intend to keep using your computer as Ubuntu-only, you should back up the data on the partition in question, convert the partition to a Linux-native filesystem (ext4fs, btrfs, XFS, etc.), and restore the data; or back up the data, delete the partition, expand your Ubuntu partition, and restore the data. Using NTFS on a Linux-only computer is asking for trouble, since when a problem occurs (as you've encountered), the only solution is to use Windows to fix it.
While you're considering this, I recommend you look into the possibility of using a separate /home partition, as covered here. Various other questions, like this one, cover the mechanics of creating a separate home partition. I mention this because my hunch is that the data on your NTFS partition would belong, mostly or completely, in your home directory, and for a dedicated Ubuntu machine, IMHO, a separate /home partition is a moderate advantage for such a system.
