We can read that:
Since Telegram's launch in 2013, you can send files up to 1.5 GB and access them from any of your devices, including computers. Source: Shared Files and Fast Mute.
Although it doesn't say anything about the groups.
So my question is, what is the storage limit for the group I've created?
Is it still 1.5GB per person (sent files), or there is some other limit per group?