[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"cheat-sheet---en":3,"domain-info---en":3,"topic-info----en":3,"prev-aws-certified-cloud-practitioner-cloud-technology-and-services-storage-services-s3-storage-classes-en":4,"lesson-aws-certified-cloud-practitioner-cloud-technology-and-services-storage-services-s3-storage-classes-en":379,"next-aws-certified-cloud-practitioner-cloud-technology-and-services-storage-services-s3-storage-classes-en":390},null,{"locked":5,"reason":3,"meta":6,"item":17},false,{"title":7,"description":8,"isFree":9,"estimatedMinutes":10,"difficulty":11,"learningObjectives":12},"Amazon S3 and Object Storage","Learn what object storage is, how Amazon S3 organizes data into buckets and objects, and why S3 is the default choice for storing files, backups, and data at scale.",true,16,"beginner",[13,14,15,16],"Define object storage and compare it with block and file storage","Explain how Amazon S3 organizes data into buckets, objects, and keys","Describe S3 durability and availability and what each one means","Identify how S3 keeps data private and the common ways to use it",{"id":18,"title":7,"body":19,"description":8,"difficulty":11,"estimatedMinutes":10,"extension":302,"infographics":303,"isFree":9,"learningObjectives":313,"meta":314,"navigation":9,"path":315,"quiz":316,"seo":376,"stem":377,"__hash__":378},"courses/courses/aws-certified-cloud-practitioner/en/domains/03-cloud-technology-and-services/04-storage-services/01-amazon-s3-and-object-storage.md",{"type":20,"value":21,"toc":291},"minimark",[22,27,31,34,38,41,46,114,117,121,124,132,139,150,160,164,167,173,179,183,186,189,211,214,218,221,261,264,268],[23,24,26],"h2",{"id":25},"why-this-matters","Why this matters",[28,29,30],"p",{},"Amazon S3 is one of the most used services in all of AWS, and it shows up constantly on the CLF-C02 exam. Almost every other service connects to it in some way: backups land in S3, data lakes are built on S3, logs are written to S3, and static websites are served from S3. If you understand S3 well, a large slice of the storage questions become easy.",[28,32,33],{},"S3 stands for Simple Storage Service. It is object storage, which is the first of three storage types you need to recognize for the exam. This lesson covers what object storage is, how S3 is organized, and the durability and security promises that make it the default place to put data on AWS.",[23,35,37],{"id":36},"object-block-and-file-storage","Object, block, and file storage",[28,39,40],{},"There are three main ways to store data, and AWS has a service for each. Knowing the difference is a common exam point.",[42,43],"infographic",{"alt":44,"slug":45},"A comparison of object storage holding whole files with metadata, block storage split into raw blocks, and file storage arranged as a folder hierarchy, each mapped to its AWS service.","storage-types-object-block-file",[47,48,49,68],"table",{},[50,51,52],"thead",{},[53,54,55,59,62,65],"tr",{},[56,57,58],"th",{},"Type",[56,60,61],{},"How it stores data",[56,63,64],{},"AWS service",[56,66,67],{},"Good for",[69,70,71,86,100],"tbody",{},[53,72,73,77,80,83],{},[74,75,76],"td",{},"Object storage",[74,78,79],{},"Whole files as objects in a flat space, each with metadata and a unique key",[74,81,82],{},"Amazon S3",[74,84,85],{},"Backups, media, data lakes, static sites",[53,87,88,91,94,97],{},[74,89,90],{},"Block storage",[74,92,93],{},"Raw volumes split into fixed-size blocks, attached to one server",[74,95,96],{},"Amazon EBS",[74,98,99],{},"Boot disks, databases, low-latency app data",[53,101,102,105,108,111],{},[74,103,104],{},"File storage",[74,106,107],{},"A hierarchy of folders and files shared over a network",[74,109,110],{},"Amazon EFS, Amazon FSx",[74,112,113],{},"Shared drives, content stores, lift-and-shift apps",[28,115,116],{},"Object storage does not work like the drive in your laptop. You do not edit part of a file in place. Instead, you store, retrieve, and replace whole objects, and each object carries metadata that describes it. This design is what lets S3 scale to any amount of data while staying simple. The other two types, block and file, get their own lessons later in this topic.",[23,118,120],{"id":119},"how-amazon-s3-is-organized","How Amazon S3 is organized",[28,122,123],{},"S3 has only a few building blocks, and they are quick to learn.",[28,125,126,127,131],{},"A ",[128,129,130],"strong",{},"bucket"," is a container for your objects. You give it a name and pick an AWS Region when you create it, and you cannot change either afterward. General purpose bucket names live in a global namespace, so the name has to be unique across all AWS accounts, not just yours. Objects you store stay in the bucket's Region unless you choose to copy or replicate them elsewhere.",[28,133,134,135,138],{},"An ",[128,136,137],{},"object"," is a file plus the metadata that describes it. The metadata is a set of name-value pairs, such as the content type and the last-modified date, and you can add your own. A single object can be up to 5 TB, and a bucket can hold any number of objects, so total capacity is effectively unlimited.",[28,140,126,141,144,145,149],{},[128,142,143],{},"key"," is the unique name of an object inside its bucket. S3 uses a flat structure, but a key can contain slashes, so ",[146,147,148],"code",{},"invoices/2026/january.pdf"," looks and behaves like a folder path even though there are no real folders underneath. The combination of bucket name and key points to exactly one object.",[151,152,158],"pre",{"className":153,"code":155,"language":156,"meta":157},[154],"language-text","Bucket:  acme-reports          (globally unique name, in one Region)\n  Object key:  invoices/2026/january.pdf   -> the PDF file + metadata\n  Object key:  logs/access-2026-06-19.log  -> the log file + metadata\n","text","",[146,159,155],{"__ignoreMap":157},[23,161,163],{"id":162},"durability-and-availability","Durability and availability",[28,165,166],{},"S3 makes two promises that sound similar but mean different things, and the exam likes to test the difference.",[28,168,169,172],{},[128,170,171],{},"Durability"," is about not losing your data. S3 Standard is designed for 99.999999999% durability, often called eleven nines. To reach that, S3 automatically stores copies of each object across at least 3 Availability Zones in the Region. If a disk or even a whole Availability Zone fails, your object is still safe. In practice, this means you can treat S3 as a place where data you put in stays put.",[28,174,175,178],{},[128,176,177],{},"Availability"," is about being able to reach your data when you ask for it. S3 Standard is designed for 99.99% availability. A service can be extremely durable but briefly unavailable, so the two numbers measure different risks. Durability protects the bytes; availability protects your access to them.",[23,180,182],{"id":181},"keeping-data-private","Keeping data private",[28,184,185],{},"S3 buckets and objects are private by default. When you create a bucket, Block Public Access is turned on, which stops accidental exposure to the internet. Nothing is reachable until you explicitly grant access.",[28,187,188],{},"You control access in a few ways:",[190,191,192,199,205],"ul",{},[193,194,195,198],"li",{},[128,196,197],{},"IAM policies"," decide what your users and roles are allowed to do across AWS, including S3.",[193,200,201,204],{},[128,202,203],{},"Bucket policies"," are resource-based rules attached directly to a bucket, useful for granting access to specific principals or whole prefixes.",[193,206,207,210],{},[128,208,209],{},"Access control lists (ACLs)"," are an older mechanism, now disabled by default and rarely the right choice.",[28,212,213],{},"S3 also encrypts new objects at rest by default and supports encryption in transit. And with S3 Versioning, you can keep multiple versions of an object so you can recover from an accidental delete or overwrite. You do not need the deep details for the exam, but you should know that S3 is private and access-controlled out of the box.",[23,215,217],{"id":216},"common-use-cases","Common use cases",[28,219,220],{},"S3 fits a wide range of jobs. The most common ones to recognize:",[190,222,223,233,243,249,255],{},[193,224,225,228,229,232],{},[128,226,227],{},"Backup and restore",", and long-term ",[128,230,231],{},"archive"," of data you must keep.",[193,234,235,238,239,242],{},[128,236,237],{},"Data lakes"," and ",[128,240,241],{},"big-data analytics",", where huge datasets are queried in place.",[193,244,245,248],{},[128,246,247],{},"Static website hosting",", serving HTML, images, CSS, and JavaScript directly.",[193,250,251,254],{},[128,252,253],{},"Media storage"," for images, video, and large files used by applications.",[193,256,257,260],{},[128,258,259],{},"Application data and logs",", including content uploaded by users.",[28,262,263],{},"A simple rule for the exam: if a question describes storing files, objects, backups, or large unstructured data, and there is no need for a file system or a boot disk, the answer is almost always Amazon S3.",[23,265,267],{"id":266},"exam-tips","Exam tips",[190,269,270,273,276,279,282,285,288],{},[193,271,272],{},"Amazon S3 is object storage. Block storage is Amazon EBS, and file storage is Amazon EFS and Amazon FSx.",[193,274,275],{},"A bucket is a container with a globally unique name, tied to one Region. An object is a file plus metadata, identified by a key.",[193,277,278],{},"A single object can be up to 5 TB, and total storage is effectively unlimited.",[193,280,281],{},"S3 Standard is designed for eleven nines (99.999999999%) of durability by storing data across at least 3 Availability Zones, and 99.99% availability.",[193,283,284],{},"Durability means not losing data; availability means being able to reach it. They are different measures.",[193,286,287],{},"Buckets are private by default, with Block Public Access on. You grant access with IAM policies, bucket policies, or access points.",[193,289,290],{},"Reach for S3 when a scenario involves backups, archives, data lakes, static websites, or storing large files.",{"title":157,"searchDepth":292,"depth":292,"links":293},3,[294,296,297,298,299,300,301],{"id":25,"depth":295,"text":26},2,{"id":36,"depth":295,"text":37},{"id":119,"depth":295,"text":120},{"id":162,"depth":295,"text":163},{"id":181,"depth":295,"text":182},{"id":216,"depth":295,"text":217},{"id":266,"depth":295,"text":267},"md",[304],{"slug":45,"concept":305,"style":306,"aspectRatio":307,"labels":308},"Three internal structures side by side: object storage as a flat space of whole files each carrying metadata (S3), block storage as raw fixed-size blocks on a volume attached to one server (EBS), and file storage as a shared folder tree that many machines mount (EFS). A small note contrasts how writes work: objects are replaced whole while blocks are edited in place. The object storage panel gets the orange accent, since S3 is the default answer for most storage scenarios. The takeaway: matching the internal structure to the workload is how you pick between S3, EBS, and EFS.","comparison","16:9",[309,310,311,312],"Object: whole files + metadata (S3)","Block: raw blocks, one server (EBS)","File: shared folder tree (EFS)","Objects replaced whole, blocks edited in place",[13,14,15,16],{},"/courses/aws-certified-cloud-practitioner/en/domains/03-cloud-technology-and-services/04-storage-services/01-amazon-s3-and-object-storage",{"passingScore":317,"questions":318},70,[319,328,336,344,352,362,368],{"question":320,"type":321,"options":322,"correctAnswer":324,"explanation":327},"What kind of storage service is Amazon S3?","single",[323,324,325,326],"Block storage you attach to a single server","Object storage for files of almost any size and type","A relational database service","A managed file system mounted over NFS","Amazon S3 is an object storage service: you store files as objects in buckets. Block storage is Amazon EBS, file storage is Amazon EFS, and a relational database is Amazon RDS.",{"question":329,"type":321,"options":330,"correctAnswer":332,"explanation":335},"In Amazon S3, what is a bucket?",[331,332,333,334],"A virtual server that runs your application","A container that holds objects","A single block on a disk volume","A folder inside another object","A bucket is the top-level container for your objects, and you give it a name and a Region when you create it. Objects are the files you store inside the bucket, each identified by a key.",{"question":337,"type":321,"options":338,"correctAnswer":340,"explanation":343},"Amazon S3 Standard is designed for 99.999999999% (eleven nines) durability. What does durability describe?",[339,340,341,342],"How fast you can upload an object","How likely your stored objects are to survive without being lost","The percentage of time the service is reachable","The maximum size of a single object","Durability is about not losing your data. S3 Standard copies objects across at least 3 Availability Zones, so the chance of losing an object is extremely small. Availability, a separate measure, describes how often you can reach the service.",{"question":345,"type":321,"options":346,"correctAnswer":348,"explanation":351},"By default, who can access the objects in a new S3 bucket?",[347,348,349,350],"Anyone on the internet","Only the bucket owner and identities you explicitly grant access to","Every user in the same AWS Region","Any AWS account until you turn on Block Public Access","S3 buckets and objects are private by default, and Block Public Access is turned on at the bucket level. You must explicitly grant access through IAM policies, bucket policies, or access points before anyone else can reach the data.",{"question":353,"type":354,"options":355,"correctAnswers":360,"explanation":361},"Which of the following are valid use cases for Amazon S3? (Select all that apply.)","multiple",[356,357,358,359],"Storing backups and archives","Hosting the files for a static website","Acting as the boot disk for an EC2 instance","Holding data for a data lake or analytics",[356,357,359],"S3 is built for backups, static website files, and data lakes, among many other uses. It cannot be a boot disk: an EC2 instance boots from an Amazon EBS volume, which is block storage.",{"question":363,"type":321,"options":364,"correctAnswer":366,"explanation":367},"A bucket name only needs to be unique inside your own AWS account.",[365,366],"True","False","General purpose S3 bucket names live in a global namespace, so a name must be unique across all AWS accounts in a partition, not just your own. The object key, by contrast, only needs to be unique within its bucket.",{"question":369,"type":321,"options":370,"correctAnswer":373,"explanation":375},"What identifies a single object within an S3 bucket?",[371,372,373,374],"Its IP address","Its Availability Zone","Its key","Its instance ID","Every object has a key, the unique name for that object inside the bucket. The combination of bucket name and key (plus a version ID if versioning is on) points to exactly one object.",{"title":7,"description":8},"courses/aws-certified-cloud-practitioner/en/domains/03-cloud-technology-and-services/04-storage-services/01-amazon-s3-and-object-storage","zo8-8SzwY1dld9WsBFK__Ws99w_5NRxRFSd0xY4hrjY",{"locked":9,"reason":380,"meta":381,"item":3},"paywall",{"title":382,"description":383,"isFree":5,"estimatedMinutes":384,"difficulty":11,"learningObjectives":385},"S3 Storage Classes","Understand the Amazon S3 storage classes, from S3 Standard to the Glacier archive tiers, and how lifecycle rules and Intelligent-Tiering move data to cut storage costs.",18,[386,387,388,389],"Explain why S3 offers multiple storage classes","Compare S3 Standard, Standard-IA, One Zone-IA, and Intelligent-Tiering","Describe the three Glacier classes and their retrieval times","Identify how lifecycle rules and Intelligent-Tiering reduce cost",{"locked":9,"reason":380,"meta":391,"item":3},{"title":392,"description":393,"isFree":5,"estimatedMinutes":10,"difficulty":11,"learningObjectives":394},"Block Storage with Amazon EBS","Learn what block storage is, how Amazon EBS volumes attach to EC2 instances, the SSD and HDD volume types, and how snapshots back up your data to Amazon S3.",[395,396,397,398],"Define block storage and explain what Amazon EBS provides","Describe how EBS volumes attach to EC2 instances and stay within one Availability Zone","Compare the SSD and HDD EBS volume types and their use cases","Explain how EBS snapshots back up volume data to Amazon S3"]