There are a number of third-party tools for migrating data from SharePoint On-Premises to SharePoint Online, as well as for migrating file shares into OneDrive for Business. Microsoft also provides a free utility called the SharePoint Migration Tool which can be used for both scenarios. 

As with the Exchange Online migrations it's good for you to know what the native options are and when you might have additional requirements that would push towards using a third-party tool for your migration. Let's take a few minutes and go through the SharePoint Migration Tool, and show you what the migration looks like. 

I've already downloaded the SharePoint Migration Tool and have it running here on my desktop. Once you open it up, it's gonna prompt you to log in to Office 365, authenticate using your global admin credentials, and click on Start your first migration. If you're migrating to OneDrive for Business, and you're doing multiple OneDrive migrations, you wanna choose the option to use a JSON or a CSV file for a bulk migration. When you click this option it's gonna give you a path so you can choose your file, as well as the option to view a sample. Now the sample's a little bit strange because the OneDrive migration sample that they give you includes a number of columns, and as well as, as you'd expect, some sample data to fill it up, but you're not allowed to use any of the headers in the columns. So what I recommend doing is grab the sample file, figure out exactly what you need to have to map to it. 

So for instance the column A is my Source. SourceDocLib and SourceSubFolder really only apply if I'm doing a SharePoint migration. You can see here it's left blank for a local folder. And it's included for a SharePoint site. So I'm gonna leave that blank on mine but you do need to leave those columns existing but empty. You can't put your target into B, the target has to remain in column D, but it can't have a header, a little bit strange, but once you get that figured out it's not too bad. 

So my TargetWeb is going to be the URL to my OneDrive Library, not the full path, just as far as it gets to my name, and then the Documents portion. So it just shows that it's going into the Document Library. I've got this ready to go, all saved up, say no, and I'm gonna go ahead and choose my file, onedrive-migration is mine, click Add, and we're gonna go Next, you can add other data there if you want. In this case we're just doing a very simple migration, so I'm gonna click Next. This is a great option here, if you have a lot of data that you're getting ready to migrate and you wanna prescan it beforehand, make sure you use this option, just do a scan only. Help you find any kind of issues that need to be resolved around folders or path lengths or invalid filenames, or anything that's gonna give you a hassle on the migration, use this option to perform the scanning and start the migration if you want to, or you can just say, we're gonna leave it off, and go from there. 

There's also some advanced settings here you can look around with and just see some of the options here that are available to you for automation and having the migration run consecutively or to keep on recurring until it's done. Great if you wanna schedule some delta migrations or incremental syncs as you're getting ready to cutover your users. Again very simple, we're just gonna keep everything as the defaults and click the Migrate button. Now it is gonna start by scanning the items in my folders. So it's gonna go ahead and do that now. Okay, it's a small amount of data so the eight items were scanned and there weren't any issues, eight out of eight items were migrated, 2.61 megabytes. 

Let's take a look at the report here. Okay, just gives me a bunch of files I can go and look at later. Basically I'm gonna be okay 'cause everything is eight out of eight, zero issues, and I'm not gonna save this. And then if I go to my OneDrive folder I can see the files that I've migrated have all been copied in and migrated and good to go, and we have a migration complete. Once again this is a very simple migration tool. You might have some requirements that are gonna make it necessary for you to use something else, but in the meantime it's free, it's relatively easy to use once you understand how to get the CSV file populated correctly. And yeah, that's it, pretty straightforward.