The maximum file size that can be uploaded to OneDrive is currently 250 gigabytes. This limit applies to individual files uploaded through OneDrive for personal use, as well as through OneDrive for Business. It is important to note that this maximum file size applies to uploads made via the OneDrive website, OneDrive desktop app, and mobile applications. Users are encouraged to keep in mind that while uploading large files, the upload speed may be influenced by one's internet connection speed and stability. Additionally, OneDrive has different storage plans, so users should also ensure that they have sufficient storage space available in their account for the files they intend to upload. For further details, it is advisable to refer to the official OneDrive documentation or support page available online.