Hi @Ziad Bathish ,
I think your disk space shouldn't be considered as file storage for your project.
If you started development process you can use internal disk space for this purpose, but when you are ready to go online I strongly recommend to use Azure Blob Storage for your images.
It shouldn't destroy your budget.
Please find more information about pricing on below calculator page:
https://azure.microsoft.com/en-us/pricing/details/storage/blobs/
https://azure.microsoft.com/en-us/pricing/calculator/?service=storage