Cloud storage services are great for keeping documents. Many of them give you cloud storage for free and Air Explorer support them. Adding up each of them you can get a good amount of storage space in the cloud for free and with Air Explorer you can distribute your files ald folders among them.
List of storage services:
–Google Drive: 15GB
–Amazon Loud Drive: 5GB
You can see the free space in your clouds accounts easily.
Select the cloud account and in the bottom right corner you can see the free espace you have to work in it.
You can click on number to refresh the value. And, if you stop the mouse over the number, you can see the percentage of free space and the free space/total space.