How can I delete chats and media files?

The management of chats and media files depends on your operating system:

Android

In the side menu, navigate to Settings > Media & Storage > Storage Management, where you can check the storage and choose between the following options:

• Delete media and files that are older than the specified amount of time (1 week to 1 year)
  
• Delete messages that are older than the specified amount of time (1 week to 1 year)
  
• Automatically delete messages, media, and files after a specified amount of time (1 week to 1 year)

Selectively delete media files of specific chats: In a chat, select “Media Gallery” in the menu and use the drop-down menu to filter the listed files (all, images, videos, voice messages, other files). Tap and hold an item, and then tap on other items to add them to the selection (or tap the “Select all” button in the title bar to select all items). Finally, tap the trash-bin icon to delete the selected items.

To delete multiple chat messages at once, tap and hold one message, select the others you wish to delete, and then tap the trash-bin icon in the top right corner.

iOS

In “Settings > Storage Management,” you get an overview of your device’s disk space and the space used by Threema. To free up space, you can choose between the following options:

• Delete all media and files (of a certain age)
  
• Delete all messages (of a certain age), including media and files
  
• Automatically delete messages, media, and files after a specified amount of time (1 week to 1 year)

To delete all media files of a certain chat:

• Open the chat, and tap on the title bar
• Tap “Media” in the bar that appeared below the title bar
  
• Tap "Select"
• You can now either "Select All" or tap on certain media files to select them
• To delete the files, tap on the trash-bin icon in the bottom left corner