OP3 low on storage, can't use OnePlus Swich since I can't backup! Any advice, please help!?

[lady_Nina]

Storage on my OP3 is almost full (98%) but I am changing to an OP5 with 128GB. How can I use OP Switch for the transfer as I don't have enough free space on my OP3 to back up first.
I'm so sacred of losing my app data, especially text Messages from various apps (maybe silly sounding but true).
I was thinking maybe I'll download / transfer all my photos and videos (which are taking up huge storage space) on my laptop and on Google Cloud, and then try and see if I'll have enough room for the backup! Grrrrr.
Kind of frustrating and counter-productive if one is low on storage on their phone and can't switch, because they can't backup!
And advice or suggestions please?

 

[SactoKingsFan]

Save your important videos, photos, etc. to the cloud service you use, then delete those from the OP3. After that you can proceed with the transfer.

 

[Javier P]

Save your important videos, photos, etc. to the cloud service you use, then delete those from the OP3. After that you can proceed with the transfer.

This looks like the best plan. You can also clear cache for some apps like Chrome, social media, messaging, galleries ... They usually have big cache files.