lightroom taking hours to export

[#1]

I used to be able to export from lightroom in about 10-20 minutes, now its taking over 6 hours just to export the same amount of files.

[#2]

I used to be able to export from lightroom in about 10-20 minutes, now its taking over 6 hours just to export the same amount of files.

[#3]

Where are you exporting to?

1. Internaal hard drive
2. External,hard drive
3. Cloud 
4. NAS

[#4]

And, how much space on the drive where you are exporting?

Why not -- also give us your full hardware specifications.

[#5]

Mac or Windows? Which version of the OS?

Which exact version of Lightroom?