Deciding what business information you need to back up online depends on several things. First, most backup services give you a certain amount of storage either for free or for a small fee. If you want additional storage, you'll have to pay. So, depending on the amount of information your company has, you may have to make some choices about what to back up in order to stay under your storage limit.

Document back up choices also depend on the speed of your Internet connection. If you're lucky enough to have DSL or another type of high-speed access, you can upload large amounts of data in a relatively short time. If you have a regular modem, however, uploading data can be a slow, tedious process. Most word processing documents and spreadsheets are fairly small, and you can back them up quickly no matter how you connect to the Internet. If you're planning to back up databases, graphics or even entire applications, however, you may want to be more selective.

Finally, what you back up depends on whether an online service is the only place you back up your data. If you already back up your data elsewhere and simply use the online service to access files when you travel, you've got an easy decision. If you use an online service as your primary (or only) backup option, however, you should make sure that you back up all of your vital data regardless of how long it takes.