First of all, I think that it's very unlikely from customs to inspect your computer and even if they decide to inspect, then how is encrypted disk space going to protect you? They'll force you to decrypt it or will seize your hardware.
Saving something on Google Drive is never a good idea.
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That's why you use encrypted disk/files with hidden partitions (like VeraCrypt can do). If forced to decrypt you just give the standard password which decrypts to some wallet with only minimal value in it. The hidden partition is impossible to detect/prove and only accessible with the correct second password. When they seize your hardware you still have dozens of backups at home, online, whatever in the same encrypted container.