SD card saying 'not formatted' in camera after deleting files from card on computer?

SD card saying 'not formatted' in camera after deleting files from card on computer?
Added (1). I deleted the files from 2 SD cards by opening them in finder (on Mac) and then manually deleted them. Both SD cards now come up on my camera as 'This card is not formatted. Format the card'. I googled this and tried going to utilities>disk utility and restored the card and 'repaired' it. I put it back in my Nikon and still not working. Help appreciated! Also saw from google results st using Terminal but opened it and was a bit scared bc codes >.< so if you think that's a solution go easy on me!
Added (2). I deleted the files from 2 SD cards by opening them in finder (on Mac) and then manually deleted them. Both SD cards now come up on my camera as 'This card is not formatted. Format the card'. I googled this and tried going to utilities>disk utility and restored the card and 'repaired' it. I put it back in my Nikon and still not working. Help appreciated! Also saw from google results st using Terminal but opened it and was a bit scared bc codes >.< so if you think that's a solution go easy on me!

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Help choosing a camera?

What's the best camera to get for a girl who has an eye for photography but doesn't know her way around a DSLR super well? I know the basics, but nothing too advanced.

My previous camera was a Nikon D60, but it's outdated kind of falling apart. So I'm looking for something that's going to give me good, high quality pictures while still being affordable. (Preferably a Nikon, under $600-$700)
Added (1). Additional info

Not looking for an entry level camera, I spent 5 years with that Nikon D60. Something a level or two up from that would be great.

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Is a Nikon d3200 worth buying for a beginner?

I'm barely going to start photography, I'm 18 and want just a good camera. Is the Nikon 3200 worth buying? I'm thinking of purchasing just for taking random photos everywhere I go, just to look back at later in life, and I just always like taking pictures when I was younger. I was also thinking of purchasing at this moment because bestbuy has a good deal at $530 for a whole kit. Is this camera worth the buy for a beginner whose going to take random pics and vids?

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