It can take a bit to figure out pictures here depending on your setup.
There is a good PDF from the help forums here:
Including Images and Attachments (as of 24 Jan 2020)
Janey/Ourworkbench also has a nice write-up, here's one copy:
My “new” old machines.
Some people are currently having issues and have found the comment Janey has about "do not preview" helps them.
For me, I take pictures with an old school digital camera and my file sizes are too large, I have to reduce the images first. No connection with this site and while it does have some paid upgrades, I use for free:
https://www.reduceimages.com/