@Georg

If you just want to share files to your friends, and don't want to sign up for an account, prefer to share files anonymously, then the following file sharing tools are worth using.

U-Dictionary is one of the successful apps from China to the world. It has beated Google Translate in the Google Play.

So, you can only pick up your headphones yourself.

This air conditioner is made of paper and can be laid on the wall like a blanket.