You can use hubiC online storage for all file types: .txt, .doc, .pdf, .avi, .mov, etc. The only restriction: file names can't exceed 248 characters and folder names are limited to 256 characters.
You can deposit as many files as you want on your hubiC, within the limits of the space allotted to you. However, for optimimum performance, we recommend that you do not to exceed 50,000 files per folder.
No, there's no size limit for files deposited on hubiC, except, of course, the amount of free space available on your hubiC account. However, the size of a file deposited via the web application cannot exceed 1GB (soon to be 4GB) and/or 10,000 different files. This limitation is actually inherent in the web browser capacities.
No, hubiC is open to users in all countries.