In total, you can collect 60 Datadiscs in Star Wars Jedi: Survivor. 59 of them you will find by exploring the planet Jedha or Shattered Moon, the last one you can get by winning a holotactics battle in Pyloon's Saloon at Koboh. For this to be possible you must first recruit Bhima and Tulli and T-1N8. When you have done this, head to the saloon, find the holotactics table and defeat T-1N8 in a holotactics battle.
Where To Spend Datadiscs In Star Wars Jedi Survivor?
You can use the Datadiscs you collect to purchase various types of gear at the Zee's Datadisc Decryption store located in Pyloon's Saloon on the planet Koboh.
