Unable to view .HEIC photo

Why i can’t see photo shot from iPhone XS Max ?
App doesn’t support HEIC format?

Photos must be saved as jpg. See this Apple support doc:

My Cloud Home mobile app will only generate a thumbnail if the HEIC source was the mobile phone.
If the source is computer or USB backup, thumbnails are not generated for HEIC.

iOS HEIC Files Show No Thumbnail and Unsupported Format

Only newer wd devices may work properly with HEIC, OLDER ONES CAN’T…