gnome-disk-utility from home:alveus:budgie project
Select Your Operating System
Add repository and install manually
For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:alveus:budgie/openSUSE_Tumbleweed/home:alveus:budgie.repo zypper refresh zypper install gnome-disk-utility