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On a bag: I take a shoulder bag. I like light bags as you can get an extra lens for free (weight-wise). For example I have a very nice ThinkTank Retrospective bag (or two), but it's Canvas and not so light. I have an old Kata bag (they were bought by Manfrotto so are no longer around) which is a mid-sized lens lighter, so IMHO more a Holiday choice. Oh and I hang one of these on the outside of my bags:https://www.amazon.co.uk/dp/B07XTDQFNX(Not a monetised link by me...)By a couple of Nite-Ize Carabiners to put either a water bottle if its Hot or an umbrella if it's Rainy, but in either case keep the water away from the Camera stuff.These fit well:https://www.amazon.co.uk/dp/B0160HYB8S?th=1https://www.amazon.co.uk/dp/B0B15JK464 A spare P battery if you don't have one? Obviously put the charger on the list to take, rather than assuming you'll remember it, plus a plug adapter. Actually I'd start a list now and keep adding to it for a while, extra things will crop up. Oh and remove a few if it gets too long... Filters - C.Pol is the main one you can't do in post, maybe a ND or two. Step rings to fit multiple lenses if might be necessary, a filter wrench to get it off if it gets stuck (confession - I don't use these). I'd think carefully about the weight and if you can reduce it. Three lenses is a fair bit if it's hot and you walk a lot, unless photography is a main aim of the trip. You can always rent a lens to reduce size/weight, but check whatever insurance it comes with is good for where you are going and get used to it first. These days I mostly take the 24-105/4 on longer trips and that's it (possibly the 20/1.4 if a lot of interiors or vast landscapes would feature), but if I wanted to shoot stuff further away the 70-200/4 would come, as it's teeny and excellent. Not sure what I'd take if I really wanted to go longer though... rent a RF 100-400 for size over quality??? I'd take a number of lens cleaning cloths, so if you get any of them sweaty/dirty you can just throw them in a plastic bag and wash them when you get back. Sealable Plastic bags are handy both for rubbish and for stuff you really don't want to get wet if it rains a lot.. If you don't have one a memory card case so you can find them easily is handy (rather than a case per card). Maybe keep on your person and not in camera bag once you have cards with images (tho I just keep them in my bag). On cards: You do need to decide if you will keep using your cards or offload the data from time-to-time. I wasn't sure if you were talking of taking a backup of the data or freeing Space by moving it, which is braver. Card size/quantity and how much you shoot is an issue there. Personally I just keep the cards in the camera and will change one if it gets full, and hope not to run out of capacity... Oh and the lossy Raw compression saves a fair bit of space if you are running short (also helps with buffer length, as does not saving JPEGs). I can't really comment on using Android to backup/copy images as I use the competition. Though as I said I don't usually back stuff up on Holiday, but might swap cards if I have something I think is very important. A fast CFE-B card will increase the effective buffer size for bursts. I find with a 150GB Delkin Black (so a fast card) my R5ii shows a 63 Raw+JPEG buffer and I get a little over 80 shots at 30fps. You might or might not care about flash-memory type too (see the P.S. below), as the really fast cards like the Blacks are pSLC which will improve speed noticeably and improve card life somewhat, but life probably doesn't matter with decent brand cards, unless you shoot 2,000+ images per day or keep the card for many years (a new card per new camera is always a good idea). If you don't shoot fast bursts you may well not care about card speed. A fast SD card is still useful in many cases, including video, if you do it, where a "V" rated card is important (it promises a minimum speed all the time, non-V ratings can have slow periods amongst a fast average). Oh and I use a Kingston Canvas React Plus 128GB SD card as a backup and overflow for the CFE card. Do note if you buy a CFE card you may well want a Reader too, depending on how you upload images. Oh and have a lot of Fun... P.S. Flash types:SLC - one bit per cell (Single Level Cell)(Think of a flash cell as a paper cup which may have water in it. It if's full-ish it's a 1, if empty-ish it's a 0.)MLC - (Multi Level Cell) two bits per cell, so 00 = empty, 01 = about 1/3 full, 10 = about 2/3 full, 11 = about fullTCL = (Triple Level Cell) three bits per cell, so 000 = empty, 001 = about 1/6 full, etc.The more bits the slower everything happens. Also Samsung sometimes call TLC cells MLC as it's still "Multi", I think that's very iffy. Anyway SLC is rare these days, and not usually in super high density architectures, so along comes pSLC which uses MLC or TLC chips but only stores one bit per cell. Hence expensive as you need more cells to get the capacity, but fast as it's just full or empty again...