Note that file sharing scripts are prohibited on premium hosting as well.
As for the “testing before upgrading”, please note this section from our home page.
Is InfinityFree a demo, trial or sample for premium hosting?
Absolutely not! InfinityFree is fully featured, completely free website hosting. We provide promotional offers for alternative, premium services for people looking for more, but their services are very different. InfinityFree is not a representation of these offers.
If you want to test iFastNet’s premium hosting, you should test iFastNet’s premium hosting, not our free hosting. iFastNet offers a 7 day money back guarantee, and their monthly pricing is actually billed per month (no three year commitment required to get good pricing), so you can try their service at very little cost and risk.