What is iCloud Drive?
With iCloud Drive, you can securely store your files in iCloud, and access them on iCloud.com using a web browser.
On iCloud.com, you can use iCloud Drive to upload and download files, share files, delete files, organize files in folders, rename files, and recover recently deleted files. You can also share folders of files with other iCloud users. Go to icloud.com/iclouddrive and sign in using your Apple ID. Make sure to use a web browser recommended in the Apple Support article System requirements for iCloud.
For more information about iCloud storage, see What is iCloud storage and backup?