(This excludes subfolders, just C:/Games/Jazz2 or C:/Games/Jazz2TSF, or wherever your Jazz2 folder is)
Here's my count:
Total files: 2,250
.J2L Files: 1,375
.J2T Files: 432
.J2? Files: 1,884
Music Files*: 150
*MOD, XM, S3M, IT, MP3, WMA, J2B, 669, and MID total.

And my laptop:
Total files: 1,941
.J2L Files: 1,158
.J2T Files: 382
.J2? Files: 1,620
Music Files: 82

I estimate together, minus overlap:
Total files: 2,912
.J2L Files: 1,693
.J2T Files: 583
Music Files: 175

What's your count?