Blizzard has acknowledged the community’s storage issues and will add a free Stash Tab for every character with Patch 1.1.1! With Patch 1.1.0’s Malignant Hearts as yet another item category to handle, these issues became even more pressing, leading the Diablo 4 development team to this bandaid fix.
Diablo 4 Season 1 Campfire Chat Liveblog
Players with a fully-upgraded Stash will now have access to a total of 5 Stash Tabs.