Hi,
Even if wave data is deleted from the imported directory, it will not disappear from the application.
The data is imported/ copied to another folder. So deleting the originals will not remove the imported files.
1. Please tell me how to delete.
If you want to delete one of your wavetable banks, click the 'X' that appears when the cursor hovers over its name.
If you want to delete one of your wavetables, click the 'X' that appears when the cursor hovers over its name inside the wavetable bank.
Please have a look in the manual section 5.3.2.5. "Delete a wavetable bank" and section 5.3.2.6. "Delete a wavetable".
2.Where is the imported wav data stored?
On Windows it's in the hidden folder C:/ProgramData/ Arturia/ Samples/ Pigments/ User/....
You need to enable Windows to see hidden files and folders to find it.
I don't know where it is on a MAC. But i guess it's in the same place where the imported Preset folder is, but just in a Samples folders instead of a Preset folder.