If you used the iCloud Documents and Data service, you need to turn on iCloud Drive to see your files. When you switch to iCloud Drive, the amount of storage space your saved files use in iCloud doesn't change.
What is iCloud Drive?
How to set up iCloud Drive
Follow these steps to turn on iCloud Drive on your devices and on the web. You can then access your files on devices with iOS 8 or later, Macs with OS X Yosemite or later, PCs with iCloud for Windows 7 and later, and on iCloud.com. If you use an iPhone 4, you can access iCloud Drive on iCloud.com via Safari.
Check that you meet the minimum system requirements for iCloud Drive.
On your iPhone, iPad, or iPod touch
- Go to Settings > your name.
- Tap iCloud.
- Turn on iCloud Drive.
You can find your files in the Files app.
On your Mac
- Go to Apple menu > System Preferences, then click Apple ID. If you’re using macOS Mojave or earlier, you don’t need to click Apple ID.
- Select iCloud.
- Sign in with your Apple ID, if you need to.
- Select iCloud Drive.
You can find your files in the Finder under iCloud.