Hi @<1523701435869433856:profile|SmugDolphin23> Thanks for response.
As shared above i am initializing the chunk_size = 10 (i.e. 10MB)

dataset.upload(show_progress=True,chunk_size=10)

Uploading 2 files :
file1.npz -> 1.63 MB
file2.npz -> 315.01 MB

In logs i get below.
File compression and upload completed: total size 316.64 MiB, 2 chunk(s) stored (average size 158.32 MiB)

Now as per the explanation the chunk size is set to 10MB
First chunk will fill upto 10MB (file1.npz is 1.63 MB + Include file2.npz).
Second chunk will fill upto 10MB.
and so on.....
So here there should be more than 2 chunks right ?