How to use the integral expansion of thunder fast transmission

Thunder fast transmission using Integral expansion method: into the Sharing file page, click on the top of "my points", you can do integral expansion. The basic space is the user default space, maintain the space does not need to consume the integral, the expansion space is the user can manually enlarge the space, each 1GB monthly expansion needs to consume 2 points (the preferential period until June 1). During the test period, the maximum expansion space is determined by the total integral, and if 10000 integral is available, the maximum expansion space is 100GB. At the beginning of each month, the rapid transmission of Thunder will be based on the size of expansion space, automatically deducted from the account corresponding points.