Prometheus use a timeseries databases with vacuum, the documentation gives some maths to plan your disk consumption:
On average, Prometheus uses only around 1-2 bytes per sample. Thus, to
plan the capacity of a Prometheus server, you can use the rough
needed_disk_space = retention_time_seconds * ingested_samples_per_second * bytes_per_sample
So depending on your retention configuration, 1TB could never be reach or you can keep a very long time. That said it's using prometheus local storage, using another storage system will change the maths depending on the system concerned, influxdb is one of them and has its own documentation about storage.