We need to understand that Hotmail doesn’t allow adding folders in email account; you can only attach files with it and sometimes the compressed version of folder. Here, you need to make sure that the total mail size shouldn’t exceed 25 MB. There is simple guideline to attach files in your Hotmail account; you just need to follow these guidelines and get the best experience.
Tips to attach files with Hotmail:
. No special characters in the file name
. Don’t use unsupported web browser
. Email containing files that can be a security risk won't be delivered
If needed; you can call Hotmail customer care service support helpline number toll-free for any instant help.