We will be releasing the capability to upload large files (>15GB) on Box Drive v2.27 (and beyond) . Specifically,
1) Box Drive will support chunked uploads providing a way to reliably upload large files to Box and to improve the file transfer experience. As a result of supporting chunked uploads, only portions of files that fail to upload will be retried, thereby saving users bandwidth when transferring large files.
2) Large file support will be available for file size limits up to 150GB (available for customers with the Enterprise Plus plan).
Please refer to the Box product documentation to identify the maximum file size you can upload to Box.
* Please note that due our phased release plans, even after Box Drive v2.27 release, the chunked uploads support in Box Drive will gradually be made available to you.