TS1702 trying to upload apps but it says not enough space can we purchase more space from ICloud or something or do we need to delete some things on the IPod to make more room?

Question

we are trying to sync apps, music etc. to my IPod touch but it is saying there is not enough room to upload the apps etc. from our ITunes library on my PC.  Are we able to purchase more space for example on ICLOUD for more storage or do we need to delete some of the items so there is enough room for the things we really want. 
Also, if we do need to delete some of the stuff now on IPod touch, how do I find out how much space is used up by each item so we can delete necessary items to make enough space?
Thank you,
Kellyfunpass

Answer 1

You need to delete some items from the iPod. After you install the app you can redownload then as storage space allows, by:
Downloading past purchases from the App Store, iBookstore, and iTunes Store
To download and install an app you need storage available equal to about three times the file download size.