Partitioned old hard drive not accessible

My Gateway laptop recently crashed. According to my amateur opinion, the motherboard was fried (the fan had been malfunctioning since about a year after I purchased it, so it was always heating up a lot). So I bought a hard drive enclosure with the USB cord and connected it to my new laptop. I was able to access what used to be the old C: drive easily, but the hard drive had a partition where I stored the majority of my files. For some reason, I cannot access this partition. I used EaseUs Partition Master and was able to explore the partition and saw that my files are still there, but I couldn't access them still.
I was wondering what my options are.
The only solution I could come up with is copy the entire partition to the new laptop.