I am trying to delete miscellaneous files to allow more storage but it does not allow me to. Also, many of the pre-loaded apps are sucking up my storage space and I don't want them.
Which phone? Pre-loaded: some can be disabled, few can be uninstalled. Which apps are in question?
Galaxy S5
Don't want nor need Slacker Radio, Flipboard, Verizon Tones, Amazon Kindle/Cart/Music, Hangouts.
biggest issue is "miscellaneous files - system memory" that takes up 5.46GB.
Slacker, Flipboard, Verizon Tones, Amazon Kindle/Cart can be disabled. Hangouts (I would keep it for wifi calling if you have a Google Voice number) can be uninstalled I believe.
System Memory is your recovery partition. You MUST keep that. You cant get rid of it on the usual user level anyway, but if you did, you'd have no way to restore your phone.
Only this week have I run out of storage space on my phone - I have uninstalled apps but have made little dent in my space. My pics take up 2GB - I have back-up them up elsewhere but am unable to delete them.
The phone has 16GB and 12GB of it is associated with things you say I cannot delete. The apps I use daily take up 2GB