The only major limitation is the number of files you can upload to the server. This is to avoid unintentional or intentional overloading of the filesystem of our disk array. A large number of (small) files in one directory can slow down the entire disk array in a major way. This slowdown then affects all users. Ideally, you can upload a single large file to us (e.g. an archive containing a backup of your data) or create a virtual filesystem according to our instructions (this way you can encrypt your data).
The disk space has a fixed size and a fixed maximum number of files that can be placed, depending on the service option you choose. This space and number of files includes everything that the customer places in the disk space, including any additional data and files that are necessary for the operation of the service. If the total space or max. the number of files is exhausted, the customer is not allowed to upload additional files.