Cloud storage services are terrifically useful, but none of them are perfect. FixYa's Cloud Storage Report identifies the biggest problems users have with Dropbox, Google Drive, iCloud, Box and SugarSync and what you can do about those issues.
FixYa users' biggest complaints about Dropbox are: security concerns and storage limits. There's not much you can do about the service's security snafus, except steer clear of storing sensitive information on Dropbox or, if you must, encrypting your files before you store them there. As for space limitations, there are several methods to get extra space in Dropbox for free.
Google Drive users complain about missing folders and syncing issues. Luckily, one of the menu options for Drive on your computer is "Local Google Drive folder is missing" — so you can fix issues caused by deleting folders or renaming them.
The top issue users have with SugarSync is a bit odd (or at least niche): no Quickbooks support. Sorry, not much you can do about that. As for lack of storage space and pricing, you can also get more space for free on SugarSync through referrals.
iCloud and Box users also seem to have specific problems, such as Mountain Lion update errors for iCloud and upload issues for Box. FixYa offers several troubleshooting steps/fixes for both of these services and some of the other complaints for the ones mentioned above.
Hit up the link below to read the entire report. (You can also check out a comparison of the most popular cloud services here or get help figuring out what to do with all the free online storage space.)
The FixYa Cloud Storage Report [FixYa]