How to Upload Files in Shopify?
1. Log into your Shopify Admin account.
2. Click on the Settings option on the bottom left.
3. You will see many options and you need to click on the Files option.
4. On the right top corner you will see the Upload Files button, then click on it.
5. Choose the file you want to upload from your computer.
6. After following these steps your Files (images, pdf, etc) are uploaded successfully.