Document Migration is the part of the process where you begin moving your existing files into SharePoint Online. Past experience teaches us that not all content is best housed in SharePoint, and that storing every file your company has ever created in SharePoint is generally a bad idea. It is often best to use this opportunity to provide some structure and make a conscious decision about how to move files in a manageable way.
If you must move large amounts of content, tools will be required to complete the move. There are several options available and each has its own strengths and weaknesses. They range in price from a few hundred to several thousand dollars.
Whether we use third party tools, leverage our own PowerShell commands in CloudPower, or move your files by hand, all of these will involve setting up batches of files to be moved or copied in a coordinated way. Each batch needs to be locked in order to prevent users from changing files while we work. Tools will need to be configured, and progress will have to be monitored during the process. We follow a basic pattern that follows communication plans, so users know what to expect and where and when their files have been moved.