'Why cant I transfer apps to my sd card in a J 5 model?

[AC Question]

have tried to go through steps detailed online but my phone doesnt have the change to sd card option.

 

[Rukbat]

If you installed the card as internal, there's no "external" SD card - internal eMMC and external SD are both now part of "storage", so there's nothing to "change" an app to - the phone decides what gets stored where. (Don't expect to be able to store much on an 8GB phone, SD card or not.)