Galaxy S6 won't read 64GB flash drive via OTG cable

[ashifurrahaman]

I've purchased my Galaxy S6 (SM-G920F) a month earlier. It has updated to Lollipop 5.1.1 15 days before. Yesterday, I bought a OTG cable but it can't read 64GB flash drive. However, it can read all 2 of my 32GB flash drives.

Can anyone tell me why:
1. it is not reading 64GB flash drive?
2. what to do to read 64GB, 128GB or more storage via OTG cable?

Thanks,
Ashifur Rahaman