A vanilla installation of UTAU with nothing else will occupy 8.1MB. The program itself is very small, and what takes up the most space will be additional voicebanks and the cache of USTs. You can save space by only downloading voicebanks for individual projects and deleting them after you're done, and by setting UTAU to automatically empty cache when exiting.
Before you install UTAU, check this guide to make sure you have everything set up correctly.
This tutorial will go over 4 steps to set up UTAU. Changing system locale Checking the decimal separator Installing UTAU Changing UTAU to English Changing system locale In order for UTAU to work correctly, you will need to set your system...
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