Hi. Please, help me with my writing. Thank you.

(I want to be thankful)

Hi, Kevin.

I'd like to thank you again as your help has been really important to us. Sadly, we have been having problems whilst trying to download the files. 

I can see in the picture attached that you sent us a large amount of files. That's really good of you but I think that downloading it will work better if you share just the image of the patient and physician.

Regards!

The original is really good Juan Pablo but I added a few corrections. Some are grammar some are just more commonly used in English. e.g. sent us many files. This just sounds a little strange to me even though I can't fault it grammatically. 

Well done though and I hope this helps =)