SD Card shows corrupt file names

[Mike5150]

I decided to upgrade my SD card recently, so while shopping around for the best price I found a 16GB micro SD for $20 on eBay. Not realizing it was from China, it took nearly 4 weeks to get here. After getting everything copied over to the new card, I happened to notice the root of my new SC looked normal, but clicking deeper into the file directory I find all kinds of files and folders with names that look like this /½ÅöPJ±.└⌡╝. I tried formatting the card through my phone, and I tried formatting the card with my computer and it keeps doing this. Is the card corrupted or is there something I can do to fix it?