Shall I be charged for storage?

No, you don't need to pay for storage. 

Leyifan members have the benefit of 30 days free storage.

After arriving at Leyifan warehouse, the storage period is free for the first 30 days. After the free storage period, a extension fee (30 JPY per kilo) will be calculated everyday. If your packages have stored more than 120 days, they would be abandoned by default.