Q: Help needed on exporting from Photo App

You first off have to understand resolution - file size is not resolution - the resolution relates only to the pixel dimensions of the image - the file size of a JPEG is determined by the compression you choose - compressing the image does not change the pixel dimensions at all - compression removes data form the photos and any JPEG in theory is lower finial quality than an uncompressed image like TIFF - but for virtually all uses it does not matter

When you export a modified version of the photo you are creating a new file containing the image and its files size is determined by the selections you make and has no resolution at all to the original file

Photos has limited control over file size - ir you want a specific file size then export a very high quality copy (maximum or even an uncompressed TIFF) and use a different program that gives you more compression control to compress it into the JPEG you want

But at the end of the day the file size really makes no different and it is highly likely that the large JPEG will give you the same results as an uncompressed TIFF

LN

Generally not - depends on the use of the photos - for most purposes even a medium JPEG is fine - there are few purposes that a large JPEG would not be fine for

LN