Is it proper to say , use this once and delete the other once , or is it say use these ones

[Dimkpa Onyeka]

Is it proper to say , use this once and delete the other once , or is it say use these ones and delete the other ones

[Nic_Brough__Adaptavist_]

It might be, but you have not given us any context to frame the question, so we do not know what you are asking about.

[Monique vdB]

Use this once = use this thing one time

Delete the other once = Delete this thing one time (this probably doesn't make sense)

Use these ones = use these things over here. 

Delete the other ones = delete the other things over there. 

I think your second combination is the only one that makes any sense, although you can just say "Use these and delete the other ones."