Cloud Storage and Syncronization.

Protect your Documents and Photos by syncronizing to the cloud. Syncronize your data, contacts and calendar between multiple computers and mobile devices. The difference between syncronization and backup is that if you delete a file, syncronization also deletes it (usually to a recycle bin), backup keeps the deleted file.

Features *Google Calendar/Contacts/Drive Apple iCloud Microsoft OneDrive/Outlook
Free Storage 15GB Combined email, documents, original quality photos and videos.
Unlimited photos/video at high quality.
5GB. Combined email, documents, photos. 5GB Data / 15GB Email.
Extra Storage Cost $2.79/month - 100GB. $1.29/month - 50GB. $2/month - 100GB.
Recycle Bin Retention Until out of storage. 30 days. 30 days
Calendar & Contacts Web, Mac, iPhone/iPad, Android, CalDAV,
Server name: https://www.google.com/calendar/dav/<emailaddress>/events
, CardDAV,
Server: google.com
User Name: Full Gmail address
Password: Your Gmail password
App Password.
iCloud, iTunes / Finder, CalDAV,
Server name: https://caldav.icloud.com.
If you get an error, make note of the p##- and change the server name to
https://p##-caldav.icloud.com:443
CardDAV,
Server: contacts.icloud.com
User Name: Apple id or email address (use @icloud.com even if using @me.com or @mac.com
Password: Your Apple password
App Password.
Web, iOS, Android, Windows 10, Mac,
Setup using Mac Calendar in Mac Settings > Accounts. Outlook for Mac 2013 and lower require third party addons to work.
Outlook,
Sync to Web based calendar: GO Sync Mod, Outlook CalDav Synchronizer
Sync to Outlook 2007 - 2019: iTunes (Now Finder on Mac), Blackberry.
App Password.
Bookmarks Google Chrome iCloud bookmark sync is the most flexible. You can select the browser to sync with. Edge
Windows Backup and Sync. Desktop, Documents and Pictures folders. iCloud folder. Moves Desktop, Documents and Pictures to OneDrive folder.
MacOS Backup and Sync. Desktop, Documents and Pictures folders. Moves Desktop, Documents and Pictures to iCloud folder. OneDrive folder.
iOS Google Contacts, Google Photos, Google Drive. iCloud. OneDrive.
Android Google Contacts, Google Photos, Google Drive. No support. OneDrive
* Larger free storage and syncronization without moving your files, makes Google my recommendation.
Apple's iCloud and Microsoft's OneDrive move your files when setting up syncronization.
This breaks recent file links and is a major drawback.