Free of Charge Cloud Storage for backup and sync and share
DropBox – dropbox.com
2 GB free of charge
Auto sync, file share link, mobile app, secure storage.
It just works since years.
GoogleDrive – drive.google.com
15 GB free of charge
Auto sync, file share link, mobile app, secure storage, send big files online.
It’s working fine.
Box – box.com
5 GB free of charge
File share link, mobile app, secure transfer, secure storage, access notification.
SkyDrive – skydrive.live.com
7 GB free of charge
Auto sync, file share link, mobile app, secure storage.
Sometime sync disconnects and bit slow.
Amazon Cloud Drive – amazon.com
5 GB free of charge
Mimedia – online.mimedia.com
Complete Personal Media Solution
7 GB free of charge
MegaCloud – megacloud.com
8 GB free of charge.
Auto sync, file share link, mobile app, secure storage.
Sync app is not perfect yet for Mac OS.
IDrivesync.com – idrivesync.com
10 GB free of charge (limited time offer)
Auto sync, file share link, mobile app, secure storage.
CX – cx.com
10 GB free of charge
Auto sync, file share link, mobile app, secure storage.
iCloud – icloud.com
5 GB free of charge
It is mainly for backing up the items purchased through iTunes – music, videos, ebooks, etc.
It is for use with iOS devices and Mac.