1. Drag and drop a file into Slack, or click the  plus icon next to the message field.
2. Add a message about the file if you'd like.
3. To change the file's name, click edit next to the current title.
4. Below Share with, choose where to share the file. To share a file later, or to keep it private, uncheck the the box next to Share with.
5. Click Upload when you're ready.

An uploaded file will include a preview of it. If it's an image file, the preview will display inline as long as it's smaller than 11,000 px on the longest side, or less than 32 million px total.

Anyone in the conversation can click the file to open it. To see more options, hover over the file:

   Download a copy to your computer
   Share the file without replies (if any)
   More actions, like star file or create external link

Tip: You can skip the steps above to upload a file instantly: hold the Shift key as you drop the file into Slack, or paste an image file directly into the message field.

1. Tap the message field.
2. Tap the   file with clip icon to upload a file or the   image gallery icon to upload a photo. You can choose a photo from your phone or take a new one.
3. You can give the file a title and add a message if you’d like.
4. Tap the  check mark in the top right to send.

An uploaded file will include a preview of it. If it's an image file, the preview will display inline as long as it's smaller than 11,000 px on the longest side, or less than 32 million px total.

Anyone in the conversation can tap the file to open it and can select from these options:

  Start or reply to the file thread
  Star the file
  Share the file without replies (if any)
  More actions, like Save Image or Copy Link

1. Tap the   file with clip icon in the input bar to bring up your available files.
2. To upload a file, tap the  files icon, or tap the   image gallery icon to upload a photo. You can choose a photo from your device or take a new one by tapping the  camera icon.
3. You can give the file a title and add a message if you’d like.
4. Tap the   paper plane icon in the input bar.

Slack will include a preview of the file as part of your message to the channel or direct message. The image will display inline unless it's larger than 11,000 px on the longest side or over 32 million px total.

Anyone in the conversation can tap the file to open and find more options:

  Start or reply to the file thread
  Star the file
  Share the file without replies (if any)
  More actions, like Save Image or Copy Link 

1. Tap the  plus icon next to the message box.
2. Choose a file from your recent photos, your OneDrive account, or from elsewhere on your device.

1. Hover over the message with the file you’d like to share.
2. Click the  Share message icon.
3. Choose where to share the file and add a message, if you'd like.
4. Click Share.

To share the file in more than one location by repeat these same steps.

1. Press and hold the message containing the file you’d like to share.
2. Tap Share message.
3. Choose where to share the file and add a message, if you'd like.
4. Click Send.

1. Select the file you’d like to share.
2. Tap the  Overflow menu in the top right.
3. Tap Share file. 
4. Choose where to share the file and add a message, if you'd like.

1. Hover over the file you’d like to share.
2. Click the  Share file icon.
3. Choose where to share the file and add a message, if you'd like.
4. Click Share. You can share the file in more than one location by repeating these same steps.

1. Tap the file you’d like to share.
2. Tap the  Share icon.
3. Choose where to share the file and add a message, if you'd like.
4. Click Send.

1. Select the file you’d like to share.
2. Tap the  Overflow menu in the top right.
3. Tap Share file. 
4. Choose where to share the file and add a message, if you'd like.

1. Hover over the file.
2. Click the  More actions icon.
3. Click Copy link to file. 
4. Share the file link in a channel or direct message.

1. Tap on the file or image.
2. Tap the  More actions icon.
3. Select Copy Link.
4. Share the file link in a channel or direct message.

1. Select the file or image.
2. Tap the  Overflow menu in the top right.
3. Select Copy Link.
4. Share the file link in a channel or direct message.

1. From your desktop, click the  three vertical dots in the top right.
2. Select Your Files to view the ones you've added to Slack. Or choose All Files to see what others have uploaded.
3. Use the first filer to choose the file type you're looking for.
4. Use the second filter narrow your search by who uploaded a file. 

1. Swipe from right to left to open the right sidebar.
2. Select Your Files.
3. Tap Everyone to view all files uploaded by members.
4. Or tap Just You to view files uploaded by you.

It's not possible to view all shared files from the Slack app for Android at this time.

It's not possible to view all shared files from the Slack app for Windows Phone at this time.

From your desktop, you can download any type of file that's been shared to your workspace:

1. Hover over the file you'd like to download.
2. Click the    download icon. That's it!

From your iOS device, you can download and save an image file that's been shared to your workspace:

1. Tap the image you'd like to save.
2. Tap the  three dots icon.
3. Tap Save Image.

From your Android device, you can download and save an image file that's been shared to your workspace:

1. Tap the image you'd like to save.
2. Tap the  three dots icon.
3. Tap Save Image.

Unfortunately, it's not possible to download files from the Windows Phone app.