You can upload files, to your OneDrive for Business or to your team site, by just dragging them from your computer. First, open OneDrive or the site library. Then find the documents that you want to upload in File Explorer and drag them to the space in the library where it says drag files here.
Note If you don't see the option to drag and drop files, update your copy of Office.
Instead of dragging files, you can select Upload.
In the Add a document dialog box, you can click Browse to upload an individual file or click Upload files using Windows Explorer instead to upload multiple files. If you choose the Explorer option, you can drag files from your computer into the File Explorer window. This option is easier to use if you open File Explorer first.
Tip Some libraries have restrictions that can limit how many files you can upload at a time. For example, if the library requires a specific content type, or requires a specific field, you can only upload one file at a time.
You can also create and manage documents, spreadsheets, presentations, and other types of files in a library.
Important Before you can upload or create files in a library, you need to have permission to contribute to the library. Also, in the library some file types are blocked for security reasons.
Upload large files or many files to a library
If you are uploading large files--or many files that add up to a large total size--to a library, you may get errors due to the file size limit in SharePoint or timeout errors in your version of Internet Explorer. Steps you can take to get around these errors include:
- Upload 100 or fewer files. You cannot upload more than 100 files at a time.
- If you are an Office 365 customer, avoid uploading files larger than 2 GB, which is the maximum file size by default.
- If your organization maintains an on-premises deployment of SharePoint, ask the server administrator to verify or increase the maximum file size limit to accommodate the size of the files you are uploading. The default size limit is 250 MB, but it can be increased up to a maximum of 2GB.
- For file sizes exceeding 2 GB, if you see a "Working on it" message that never goes away, follow the instructions in Microsoft Support: Internet Explorer error "connection timed out" when server does not respond.
- If you have the OneDrive for Business sync client available, use it to upload large files or multiple files. Sync will automatically upload them in the background when you're online.
More about uploading files
Your experience with adding files to a library might differ a little, depending on the version of Office or on the browser that you use. In addition, sometimes site administrators set up additional requirements in a library that you might have to work with.
Save a file: Before you can save a file for the first time, you may need to add the site as a trusted site in your browser settings. For example, in Internet Explorer, click Tools > Internet options > Security > Trusted Sites > Sites.
Require Checkout: Site owners can set up a library to require you to check out files before you edit them (and check them in when you finish). If your library requires check out, the file is checked out to you when you first upload it. You have to check the file in before other people can edit it.
Track File Versions: You can add replace an existing file with a revised version of a file. If the library is set up to track versions, you can add the revised file as a new version, which becomes part of the version history of the file. If you are uploading a new version of a file, consider typing comments about what changed in this version so that you can more easily track the history of the file.
Fill out file properties: When you add a file to a library, you may also be required to fill out a form (on the document information panel) with information about the file, such as its description, a department name, or a project number.
Approve submitted content: Site owners can set up a library to require approval of the content before it becomes visible to others who use the library. As the author, you can see the file listed and work with it, but nobody else can. For example, a legal department might require approval before documents become public.
-Office Online Help Pages