So I decided to install Ubuntu couple of weeks ago next to my Windows 10. Originally, my Win 10 is installed on SSD (Disk 0 aka C:) but it's quite small so I decided to install Ubuntu on another physical drive (HDD aka D:) by splitting its existing size into something around ~900GB for data I already had there and ~100GB for incoming Ubuntu installation.
Everything about an installation went smoothly but the thing was the performance on HDD was a bit disappointing so I decided to buy an external SSD to eventually put Ubuntu on. And since migrating exisitng Ubuntu to a different drive seemed to be a bit complicated and I haven't had anything particularly important on its partition whatsover, I simply removed Ubuntu partition so I can proceed with a fresh, clean installation on a new SSD drive.
Now here is where problem begun because since then - I am not able to allocate remaining free space to an already existing data partition as when I attempt to do so I get prompt that I have not enough space for such operation no matter if I set volume to extend by just 1MB or by entire available space on this drive.
Ideally, despite having the problem above fixed I would like to erase all the trails or markers Ubuntu originally did in the volume structure or booting mechanism so I can start from scratch and install it on a new drive.
I have already removed ubuntu directory from the booting volume from a command prompt disk manager tool so the black GRUB screen doesn't not show up on boot no longer (found a good sollution here). Still though I got a feeling that there are some artefacts which might affect my fresh installation process in future. Could be wrong, but just wanna make sure.