Upload PDF / DOCS file in IONIC 4

I am trying to upload pdf / docs file via file transfer plugin . But this plugin only support for image file. Can anyone help me to upload pdf file in IONIC 4. This is a very important issue. Please pay attaintion on this topic. Others hybrid framework has not this issue. We need to figure out that how to upload pdf file from file storage.

Why aren’t you just using the Angular HttpClient?

How can I access the files(pdf/dpcs) from phone storage with HttpClient ?

I face this problem also, you already solved the problem?