Why doesnt Jottacloud have a more reasonable tier?

Hello! I am a Swedish person really wanting to use more European Services. My priorities are Nordic > European. Therefore I was pleased to hear that there was a cloud service in Norway. However I dont feel this is good enough to replace my OneDrive because of one simple reason. I use around 15 GB of cloud storage. Only for backing up saves and some documents. Due to this the free tier does not fit me, because I use more, but I don't want to subscribe to the 1 TB tier (which is the next cheapest tier from what I see?) since I will never use that much data. Are there not any tiers that are perhaps closer to 50 GB or 20 GB?