To upload from OneDrive:
After clicking the yellow “+NEW” button in the top right corner of the datasets page, then selecting File Upload, and navigating to OneDrive. Next, you will be prompted to connect to OneDrive. Then, you will grant Gigasheet access to OneDrive.
Once you have granted access and successfully linked your OneDrive and Gigasheet accounts, you will be able to upload files to Gigasheet. supported files
See the How to Page for step-by-step visual instructions.
See this video for more information on importing from OneDrive to Gigasheet