BestSync uses multipart upload if a file is larger than 5 MB, so if files more than 1 GB are uploaded correctly, then it should work with the 200gb file. Amazon S3 multipart-upload supports up to 5TB size of one file.
Bestsync uses Multipart upload automatically when upload huge files to Amazon S3, you need not to change any setting. But to use the Multipart upload feature, the Ultimate License of Bestsync is necessary.
From the screen shot, I can see that something wrong is related to the timezone (6 hours bias) of the server. Please check the "Timezone of Server" setting. Follow these Steps: 1. Click the "Browser" button of the SFTP folder. 2. Click the "Advanced" button in the "...
Please check if you have specified correct file type filtering string, and have not exclude all files in the "Exclude or include" setting tab, try to set "All Files|*.*" in the "Filter by file types" option of the "Filter" setting tab.