When you sync your OneDrive or a SharePoint library to your device, you can upload a file from within File Explorer:
In File Explorer, locate the file you want to upload.
Select the file, then on the toolbar, select the Cut option.
In File Explorer, navigate to sync'd OneDrive or SharePoint folder where you want to put the file.
After selecting that folder, on the toolbar, select Paste.
A small status icon will appear to indicate the status of the sync to OneDrive or SharePoint:
Icon
The sync between your device and cloud storage is pending.
Blue cloud icon indicating an online-only OneDrive file
A blue cloud icon indicates that the file is only available online. Online-only files don’t take up space on your computer. You see a cloud icon for each online-only file in File Explorer, but the file doesn’t download to your device until you open it.
You can’t open online-only files when your device isn’t connected to the Internet.
Green check icon indicating a locally available OneDrive file
An online-only file. When you open it, it downloads to your device and becomes a locally available file. You can open a locally available file anytime, even without Internet access.
If you need more disk space, you can change the file back to online only. Just right-click the file and select Free up space.
Green circle icon indicating an always-available OneDrive file
The file is marked as Always keep on this device. These files have been downloaded to your device and take up space, but they’re always there for you even when you’re offline.
Regards,
Rachel Gomez