I started to mine like 3 days ago with 200 gb to try and so far I founded 0 deadlines.
Is it normal? The calculator showed like more than 20 burst per day with 200 gb.

Choose pool that fit your storage size. What pool you are mining?
Pool.burstcoin.eu
I tried also others with same results
Can you post the screen of your miner?
I got this output since 30 hours of mining
47 MB read/190 GB total/no deadline
New block 285865, basetarget 1834899
47 MB read/190 GB total/no deadline
New block 285866, basetarget 1763657
47 MB read/190 GB total/no deadline
New block 285867, basetarget 1759752
Walet reported no deadline.
Could not get mining info from Node. Will retry..
47 MB read/190 GB total/no deadline