For the best results, you must consider what your workload is and the capacity required to meet that performance. Take it this way: Using Bursting Throughput mode, the more capacity in your filesystem, the higher your baseline and burst throughput.
Many JFrog Artifactory servers scale to the TiB range in storage, which is often ample performance for the use case. For smaller filestores, however, the baseline throughput is quite low: 1 GiB of data is 50 KiB/s and scales linearly, per GiB, above that. If your workload requires more throughput than what is provided by the baseline and burst model for your capacity described above, then you should consider Provisioned Throughput mode.