My image size 20.6m but when I export it in ANY form it reduces the file size to 4! I have been searching the web and forms for answers- I have come up with nothing. Photoshop is up to date
Could you provide the exact dimensions of the document and specific details on how you are exporting. Screen shots would help a lot.
In photshop it appears to be a big file, however saved or exported in any way it is not even big enough to print a 8x10. I have done this many times before and never had a issue. I am stumped
Why aren't you using Save / Save a copy?
It's not in any way clear what you are doing. You need to me more specific and explain what you are importing from what to what and what the exact specs are.
I put together a memory mate- which I have used the template several times. I added two pictures to within layers. It should print as a 8x10 and it is set up that way. However when saved or exported in any way it becomes a smaller file and will not print at that size. Here are some screen shots
Check if the image is being scaled-down for the printer, it should be 100%.
This is normal and expected.
You need to understand that jpeg is a compressed file format. When you reopen a jpeg in Photoshop, it is decompressed back to its native full size. The size reported in Explorer is the compressed size on disk. The size reported in Image Size is the decompressed full flat pixel size.
A file format is a storage container. An open file doesn't have a file format, not until it is once again encoded for storage.
Jpeg compression is extremely effective, but there's a price: it is destructive, non-revesible and cumulative. Once saved as jpeg, the file is permanently degraded. Not much by one single save, but the degradation builds up. That's why you should never use jpeg as a working format, only as a one-off final delivery format to save bandwidth.
So physical print size, not file size?
Use Save As, not Export. Expor strips the print resolution/size metadata.
Most exporting options are to a lossy compression format.