Yes, there are few way to do so:
1 - you can track it via log by pieces id:
2020-01-25T18:59:45.830+0300 INFO piecestore upload started {"Piece ID": "3L6ZLF22IJZMOI2VTVQSCLKYNBP5H3KESAKWJU6J3GAQETYCCGMQ", "Satellite ID": 121RTSDpyNZVcEU84Ticf2L1ntiuUimbWgfATz21tuvgk3vzoA6", "Action": "PUT"}
Pieces file names = ids without first 2 symbols (which used as folder name). So just pick up random share filename from a folder and search for it in log - you will know which satellite is storing it.
2 - You can divide last day value for "space used this month " from Dashboard by 24 to convert GB**hours back to just GB.
3 - You can send graceful-exit command (there will be 2 prompts before actual start of GE, so you do not kill node this way) and client will show you disk space currently used by each satellite before GE confirmation.
But it will be nice to have such values directly in storage dashboard.