Hard Drive Formatting

I hope someone can answer me quickly as I'm struggling. A long time ago, I bought a Western Digital external Hard Drive to store my iPhone's Photos on. I struggled to format it so it would work on my MacBook but after a bunch of posts here and questions, I ended up formatting it to APFS. Linked is the whole proccess of the thread where I struggled to format it just in case it helps whoever helps me. I formatted it and I put my photos on there. Now recently, I purchased a PC with windows on it and I would like to move my photos there. When I plugged in my Hard Drive into my PC, it didn't recognize the hard drive and the hard drive didn't pop up in file manager. Does anyone have an idea on how I can format my external hard drive from APFS to NFTS without losing any data. It's extremely important that I don't lose the pictures as they are from about 7 years ago and they are pretty important. After some digging the words that kept popping up were creating a partition or something like that and then formatting but I don't really understand it.