Transfer jpg and it’s a different File in My Cloud

When I transfer a jpg file from my iPhone to my cloud it changes the type of file to a HEIC file. When I transfer the same jpg from my iPad to my cloud it stays a jpg file. What settings do I need to change in my iPhone to keep a jpg while transferring to my cloud? Step by step please.

You may want to see the following WD Support Knowledgebase articles that discuss Apple’s HEIC format and changing the Apple device settings to Most Compatible.

And see this Apple Support document.